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Heliocentrism

Index Heliocentrism

Heliocentrism is the astronomical model in which the Earth and planets revolve around the Sun at the center of the Solar System. [1]

240 relations: -ism, A. I. Sabra, Abū Ishāq Ibrāhīm al-Zarqālī, Abraham Calovius, Aether (classical element), Al-Battani, Al-Biruni, Al-Sijzi, Alexandre Koyré, Ali Qushji, Almagest, Alpha Centauri, Ancient Egypt, Ancient Greek, Andreas Osiander, Angular momentum, Archimedes, Aristarchus of Samos, Aristotelian physics, Arthur Koestler, Aryabhata, Aryabhatiya, Astrolabe, Astronomia nova, Astronomical object, Astronomical unit, Astronomy, Augustine of Hippo, Averroes, Bartel Leendert van der Waerden, Barycenter, Basra, Bernard Le Bovier de Fontenelle, Beth din, Bhāskara II, Brahmagupta, Brill Publishers, Cambridge University Press, Cardinal (Catholic Church), Celestial spheres, Center-of-momentum frame, Chabad, Christopher Clavius, Cicero, Cleanthes, Columbia University, Commentariolus, Conversations on the Plurality of Worlds, Copernican heliocentrism, Copernican principle, ..., Copernican Revolution, Council of Trent, Current Science, David Gans, David Nieto, De Docta Ignorantia, De revolutionibus orbium coelestium, Declination, Deferent and epicycle, Dialogue Concerning the Two Chief World Systems, Dictionary of Scientific Biography, Diogenes Laërtius, Dominican Order, Early Middle Ages, Earth, Earth's orbit, Earth's rotation, Eclipse, Ecphantus the Pythagorean, Egyptians, Ellipse, Elliptic orbit, Epitome Astronomiae Copernicanae, Equant, Eratosthenes, Euclid's Elements, Exoplanet, Filippo Anfossi, Florence, Focus (geometry), Frame of reference, Francesco Ingoli, Friedrich Bessel, Friedrich Georg Wilhelm von Struve, Galilean invariance, Galileo affair, Galileo Galilei, General relativity, Geocentric model, Geometry, Georg von Peuerbach, George Saliba, Giordano Bruno, Giovanni Battista Riccioli, Gravity assist, Helios, Hellenistic period, Heraclides Ponticus, Heresy, Hicetas, Hipparchus, Hypothesis, Ibn al-Haytham, Ibn al-Shatir, Ilkhanate, Index Librorum Prohibitorum, Indian astronomy, Inertial frame of reference, Inquisition, Isaac Newton, Isis (journal), James Bradley, Johann Albrecht Widmannstetter, Johann Jacob Zimmermann, Johannes Kepler, John Calvin, John Louis Emil Dreyer, Joseph Solomon Delmedigo, Judah Loew ben Bezalel, Jupiter, Kepler's laws of planetary motion, Kerala School of Astronomy and Mathematics, King James Version, Léon Foucault, Letter to the Grand Duchess Christina, Letters on Sunspots, List of Muslim astronomers, Lucio Russo, Lunar eclipse, Lutheranism, Mach's principle, Macrobius, Magnitude (astronomy), Maragheh observatory, Mars, Martianus Capella, Martin Luther, Mathematical model, Mechanical energy, Menachem Mendel Schneerson, Mercury (planet), Minute and second of arc, Moon, Moses Sofer, Muʾayyad al-Dīn al-ʿUrḍī, Muhammad ibn Zakariya al-Razi, Najm al-Dīn al-Qazwīnī al-Kātibī, Nasir al-Din al-Tusi, Natural philosophy, Natural science, New Latin, Newton's law of universal gravitation, Newton's laws of motion, Nicholas of Cusa, Nicolaus Copernicus, Nicole Oresme, Nikolaus von Schönberg, Nilakantha Somayaji, Nur ad-Din al-Bitruji, On the Sizes and Distances (Aristarchus), Otto E. Neugebauer, Padua, Paganism, Parallax, Philip Melanchthon, Philolaus, Philosophiæ Naturalis Principia Mathematica, Philosophy, Physical body, Pinhole camera, Planet, Plutarch, Pontifex maximus, Pope Alexander VII, Pope Clement VII, Pope Clement XIV, Pope Leo XIII, Pope Paul III, Pope Pius VII, Pope Urban VIII, Popular Astronomy (US magazine), Pretzel, Principle of relativity, Proclus, Ptolemy, Pythagoreanism, Radical skepticism, Reality, Regiomontanus, Relative velocity, Renaissance, René Descartes, Retrograde and prograde motion, Right ascension, Robert Bellarmine, Roman Catholic Archdiocese of Capua, Roman College, Scientific modelling, Seleucid Empire, Seleucus of Seleucia, Shlomo Benizri, Shlomo Pines, Simplicius of Cilicia, Solar eclipse, Solar System, Spacecraft, Spherical Earth, Springer Science+Business Media, Stanford Encyclopedia of Philosophy, Star, Stellar parallax, Sun, Sundial, Talmud, Tanakh, Tantrasamgraha, Telescope, Thābit ibn Qurra, The Freethinker (journal), The Sand Reckoner, The World (Descartes), Theologian of the Pontifical Household, Thomas Henderson (astronomer), Tide, Tobias Cohn, Trigonometry, Tusi couple, Tycho Brahe, Tychonic system, Ulugh Beg Observatory, UNESCO, Universe, University of Chicago Press, Varāhamihira, Vatican Observatory, Vega, Velocity, Venus, William Herschel, 61 Cygni. Expand index (190 more) »

-ism

-ism is a suffix in many English words, originally derived from the Ancient Greek suffix -ισμός (-ismós), and reaching English through the Latin -ismus, and the French -isme.

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A. I. Sabra

Abdelhamid I. Sabra (1924-2013) was a professor of the history of science specializing in the history of optics and science in medieval Islam.

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Abū Ishāq Ibrāhīm al-Zarqālī

, also known as Al-Zarkali or Ibn Zarqala (1029–1087), was an Arab Muslim instrument maker, astrologer, and one of the leading astronomers of his time.

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Abraham Calovius

Abraham Calovius (also Abraham Calov or Abraham Kalau; 16 April 161225 February 1686) was a Lutheran theologian, and was one of the champions of Lutheran orthodoxy in the 17th century.

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Aether (classical element)

According to ancient and medieval science, aether (αἰθήρ aithēr), also spelled æther or ether and also called quintessence, is the material that fills the region of the universe above the terrestrial sphere.

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Al-Battani

Abū ʿAbd Allāh Muḥammad ibn Jābir ibn Sinān al-Raqqī al-Ḥarrānī aṣ-Ṣābiʾ al-Battānī (Arabic: محمد بن جابر بن سنان البتاني) (Latinized as Albategnius, Albategni or Albatenius) (c. 858 – 929) was an Arab astronomer, astrologer, and mathematician.

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Al-Biruni

Abū Rayḥān Muḥammad ibn Aḥmad Al-Bīrūnī (Chorasmian/ابوریحان بیرونی Abū Rayḥān Bērōnī; New Persian: Abū Rayḥān Bīrūnī) (973–1050), known as Al-Biruni (البيروني) in English, was an IranianD.J. Boilot, "Al-Biruni (Beruni), Abu'l Rayhan Muhammad b. Ahmad", in Encyclopaedia of Islam (Leiden), New Ed., vol.1:1236–1238.

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Al-Sijzi

Abu Sa'id Ahmed ibn Mohammed ibn Abd al-Jalil al-Sijzi (c. 945 - c. 1020, also known as al-Sinjari and al-Sijazi; ابوسعید سجزی; Al-Sijzi is short for "Al-Sijistani") was an Iranian Muslim astronomer, mathematician, and astrologer.

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Alexandre Koyré

Alexandre Koyré (29 August 1892 – 28 April 1964), also anglicized as Alexandre or Alexander Koyre, was a French philosopher of Russian origin who wrote on the history and philosophy of science.

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Ali Qushji

Ala al-Dīn Ali ibn Muhammed (1403 – 16 December 1474), known as Ali Qushji (Ottoman Turkish/Persian language: علی قوشچی, kuşçu – falconer in Turkish; Latin: Ali Kushgii) was an astronomer, mathematician and physicist originally from Samarkand, who settled in the Ottoman Empire some time before 1472.

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Almagest

The Almagest is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy. One of the most influential scientific texts of all time, its geocentric model was accepted for more than 1200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus.

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Alpha Centauri

Alpha Centauri (α Centauri, abbreviated Alf Cen or α Cen) is the star system closest to the Solar System, being from the Sun.

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Ancient Egypt

Ancient Egypt was a civilization of ancient Northeastern Africa, concentrated along the lower reaches of the Nile River - geographically Lower Egypt and Upper Egypt, in the place that is now occupied by the countries of Egypt and Sudan.

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Ancient Greek

The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.

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Andreas Osiander

Andreas Osiander (19 December 1498 – 17 October 1552) was a German Lutheran theologian and Protestant reformer.

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Angular momentum

In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational equivalent of linear momentum.

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Archimedes

Archimedes of Syracuse (Ἀρχιμήδης) was a Greek mathematician, physicist, engineer, inventor, and astronomer.

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Aristarchus of Samos

Aristarchus of Samos (Ἀρίσταρχος ὁ Σάμιος, Aristarkhos ho Samios; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it (see Solar system).

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Aristotelian physics

Aristotelian physics is a form of natural science described in the works of the Greek philosopher Aristotle (384–).

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Arthur Koestler

Arthur Koestler, (Kösztler Artúr; 5 September 1905 – 1 March 1983) was a Hungarian-British author and journalist.

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Aryabhata

Aryabhata (IAST) or Aryabhata I (476–550 CE) was the first of the major mathematician-astronomers from the classical age of Indian mathematics and Indian astronomy.

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Aryabhatiya

Aryabhatiya (IAST) or Aryabhatiyam, a Sanskrit astronomical treatise, is the magnum opus and only known surviving work of the 5th century Indian mathematician Aryabhata.

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Astrolabe

An astrolabe (ἀστρολάβος astrolabos; ٱلأَسْطُرلاب al-Asturlāb; اَختِرِیاب Akhteriab) is an elaborate inclinometer, historically used by astronomers and navigators to measure the inclined position in the sky of a celestial body, day or night.

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Astronomia nova

Astronomia nova (English: New Astronomy, full title in original Latin: Astronomia Nova ΑΙΤΙΟΛΟΓΗΤΟΣ seu physica coelestis, tradita commentariis de motibus stellae Martis ex observationibus G.V. Tychonis Brahe) is a book, published in 1609, that contains the results of the astronomer Johannes Kepler's ten-year-long investigation of the motion of Mars.

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Astronomical object

An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.

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Astronomical unit

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.

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Astronomy

Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.

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Augustine of Hippo

Saint Augustine of Hippo (13 November 354 – 28 August 430) was a Roman African, early Christian theologian and philosopher from Numidia whose writings influenced the development of Western Christianity and Western philosophy.

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Averroes

Ibn Rushd (ابن رشد; full name; 1126 – 11 December 1198), often Latinized as Averroes, was an Andalusian philosopher and thinker who wrote about many subjects, including philosophy, theology, medicine, astronomy, physics, Islamic jurisprudence and law, and linguistics.

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Bartel Leendert van der Waerden

Bartel Leendert van der Waerden (February 2, 1903 – January 12, 1996) was a Dutch mathematician and historian of mathematics.

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Barycenter

The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.

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Basra

Basra (البصرة al-Baṣrah), is an Iraqi city located on the Shatt al-Arab between Kuwait and Iran.

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Bernard Le Bovier de Fontenelle

Bernard Le Bovier de Fontenelle (11 February 16579 January 1757), also called Bernard Le Bouyer de Fontenelle, was a French author and an influential member of three of the academies of the Institut de France, noted especially for his accessible treatment of scientific topics during the unfolding of the Age of Enlightenment.

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Beth din

A beth din (בית דין Bet Din, "house of judgement", Ashkenazic: beis din) is a rabbinical court of Judaism.

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Bhāskara II

Bhāskara (also known as Bhāskarāchārya ("Bhāskara, the teacher"), and as Bhaskara II to avoid confusion with Bhāskara I) (1114–1185), was an Indian mathematician and astronomer.

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Brahmagupta

Brahmagupta (born, died) was an Indian mathematician and astronomer.

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Brill Publishers

Brill (known as E. J. Brill, Koninklijke Brill, Brill Academic Publishers) is a Dutch international academic publisher founded in 1683 in Leiden, Netherlands.

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Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

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Cardinal (Catholic Church)

A cardinal (Sanctae Romanae Ecclesiae cardinalis, literally Cardinal of the Holy Roman Church) is a senior ecclesiastical leader, considered a Prince of the Church, and usually an ordained bishop of the Roman Catholic Church.

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Celestial spheres

The celestial spheres, or celestial orbs, were the fundamental entities of the cosmological models developed by Plato, Eudoxus, Aristotle, Ptolemy, Copernicus, and others.

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Center-of-momentum frame

In physics, the center-of-momentum frame (also zero-momentum frame or COM frame) of a system is the unique (up to velocity but not origin) inertial frame in which the total momentum of the system vanishes.

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Chabad

Chabad, also known as Lubavitch, Habad and Chabad-Lubavitch, is an Orthodox Jewish, Hasidic movement.

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Christopher Clavius

Christopher Clavius (25 March 1538 – 6 February 1612) was a German Jesuit mathematician and astronomer who modified the proposal of the modern Gregorian calendar after the death of its primary author, Aloysius Lilius.

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Cicero

Marcus Tullius Cicero (3 January 106 BC – 7 December 43 BC) was a Roman statesman, orator, lawyer and philosopher, who served as consul in the year 63 BC.

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Cleanthes

Cleanthes (Κλεάνθης Kleanthēs; c. 330 BC – c. 230 BC), of Assos, was a Greek Stoic philosopher and successor to Zeno of Citium as the second head (scholarch) of the Stoic school in Athens.

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Columbia University

Columbia University (Columbia; officially Columbia University in the City of New York), established in 1754, is a private Ivy League research university in Upper Manhattan, New York City.

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Commentariolus

The Commentariolus (Little Commentary) is Nicolaus Copernicus's brief outline of an early version of his revolutionary heliocentric theory of the universe.

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Conversations on the Plurality of Worlds

Conversations on the Plurality of Worlds (Entretiens sur la pluralité des mondes) is a popular science book by French author Bernard le Bovier de Fontenelle, published in 1686.

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Copernican heliocentrism

Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543.

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Copernican principle

In physical cosmology, the Copernican principle, is an alternative name of the mediocrity principle, or the principle of relativity, stating that humans (the Earth, or the Solar system) are not privileged observers of the universe.

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Copernican Revolution

The Copernican Revolution was the paradigm shift from the Ptolemaic model of the heavens, which described the cosmos as having Earth stationary at the center of the universe, to the heliocentric model with the Sun at the center of the Solar System.

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Council of Trent

The Council of Trent (Concilium Tridentinum), held between 1545 and 1563 in Trent (or Trento, in northern Italy), was an ecumenical council of the Catholic Church.

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Current Science

Current Science is an English-language peer-reviewed multidisciplinary scientific journal.

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David Gans

David Gans (דָּוִד בֶּן שְׁלֹמֹה גנז; ‎1541–1613), also known as Rabbi Dovid Solomon Ganz, was a Jewish chronicler, mathematician, historian, astronomer and astrologer.

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David Nieto

David Nieto (1654 – 10 January 1728) was the Haham of the Spanish and Portuguese Jewish community in London, later succeeded in this capacity by his son, Isaac Nieto.

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De Docta Ignorantia

De docta ignorantia (On learned ignorance/on scientific ignorance) is a book on philosophy and theology by Nicholas of Cusa (or Nicolaus Cusanus), who finished writing it on 12 February 1440 in his hometown of Kues, Germany.

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De revolutionibus orbium coelestium

De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473–1543).

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Declination

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.

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Deferent and epicycle

In the Hipparchian and Ptolemaic systems of astronomy, the epicycle (from ἐπίκυκλος, literally upon the circle, meaning circle moving on another circle) was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets.

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Dialogue Concerning the Two Chief World Systems

The Dialogue Concerning the Two Chief World Systems (Dialogo sopra i due massimi sistemi del mondo) is a 1632 Italian-language book by Galileo Galilei comparing the Copernican system with the traditional Ptolemaic system.

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Dictionary of Scientific Biography

The Dictionary of Scientific Biography is a scholarly reference work that was published from 1970 through 1980.

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Diogenes Laërtius

Diogenes Laërtius (Διογένης Λαέρτιος, Diogenēs Laertios) was a biographer of the Greek philosophers.

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Dominican Order

The Order of Preachers (Ordo Praedicatorum, postnominal abbreviation OP), also known as the Dominican Order, is a mendicant Catholic religious order founded by the Spanish priest Dominic of Caleruega in France, approved by Pope Honorius III via the Papal bull Religiosam vitam on 22 December 1216.

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Early Middle Ages

The Early Middle Ages or Early Medieval Period, typically regarded as lasting from the 5th or 6th century to the 10th century CE, marked the start of the Middle Ages of European history.

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Earth's orbit

Earth's orbit is the trajectory along which Earth travels around the Sun.

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Earth's rotation

Earth's rotation is the rotation of Planet Earth around its own axis.

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Eclipse

An eclipse is an astronomical event that occurs when an astronomical object is temporarily obscured, either by passing into the shadow of another body or by having another body pass between it and the viewer.

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Ecphantus the Pythagorean

Ecphantus or Ecphantos (Ἔκφαντος) is a shadowy Greek pre-Socratic philosopher.

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Egyptians

Egyptians (مَصريين;; مِصريّون; Ni/rem/en/kīmi) are an ethnic group native to Egypt and the citizens of that country sharing a common culture and a common dialect known as Egyptian Arabic.

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Ellipse

In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.

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Elliptic orbit

In astrodynamics or celestial mechanics, an elliptic orbit or elliptical orbit is a Kepler orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity equal to 0.

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Epitome Astronomiae Copernicanae

The Epitome Astronomiae Copernicanae was an astronomy book on the heliocentric system published by Johannes Kepler in the period 1617 to 1621.

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Equant

Equant (or punctum aequans) is a mathematical concept developed by Claudius Ptolemy in the 2nd century AD to account for the observed motion of the planets.

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Eratosthenes

Eratosthenes of Cyrene (Ἐρατοσθένης ὁ Κυρηναῖος,; –) was a Greek mathematician, geographer, poet, astronomer, and music theorist.

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Euclid's Elements

The Elements (Στοιχεῖα Stoicheia) is a mathematical treatise consisting of 13 books attributed to the ancient Greek mathematician Euclid in Alexandria, Ptolemaic Egypt c. 300 BC.

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Exoplanet

An exoplanet or extrasolar planet is a planet outside our solar system.

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Filippo Anfossi

Filippo Anfossi (died 14 May 1825) was a Vicar-General of the Dominicans and Master of the Sacred Palace.

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Florence

Florence (Firenze) is the capital city of the Italian region of Tuscany.

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Focus (geometry)

In geometry, focuses or foci, singular focus, are special points with reference to which any of a variety of curves is constructed.

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Frame of reference

In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.

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Francesco Ingoli

Francesco Ingoli (1578 – 1649) was an Italian priest, lawyer and professor of civil and canon law.

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Friedrich Bessel

Friedrich Wilhelm Bessel (22 July 1784 – 17 March 1846) was a German astronomer, mathematician, physicist and geodesist.

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Friedrich Georg Wilhelm von Struve

Friedrich Georg Wilhelm von Struve (Василий Яковлевич Струве, trans. Vasily Yakovlevich Struve; 15 April 1793 –) was a German-Russian astronomer and geodesist from the famous Struve family.

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Galilean invariance

Galilean invariance or Galilean relativity states that the laws of motion are the same in all inertial frames.

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Galileo affair

The Galileo affair (il processo a Galileo Galilei) was a sequence of events, beginning around 1610, culminating with the trial and condemnation of Galileo Galilei by the Roman Catholic Inquisition in 1633 for his support of heliocentrism.

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Galileo Galilei

Galileo Galilei (15 February 1564Drake (1978, p. 1). The date of Galileo's birth is given according to the Julian calendar, which was then in force throughout Christendom. In 1582 it was replaced in Italy and several other Catholic countries with the Gregorian calendar. Unless otherwise indicated, dates in this article are given according to the Gregorian calendar. – 8 January 1642) was an Italian polymath.

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General relativity

General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.

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Geocentric model

In astronomy, the geocentric model (also known as geocentrism, or the Ptolemaic system) is a superseded description of the universe with Earth at the center.

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Geometry

Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.

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Georg von Peuerbach

Georg von Peuerbach (also Purbach, Peurbach, Purbachius; born May 30, 1423 – April 8, 1461) was an Austrian astronomer, mathematician and instrument maker, best known for his streamlined presentation of Ptolemaic astronomy in the Theoricae Novae Planetarum.

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George Saliba

George Saliba is Professor of Arabic and Islamic Science at the Department of Middle Eastern, South Asian, and African Studies, Columbia University, New York, USA, where he has been since 1979.

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Giordano Bruno

Giordano Bruno (Iordanus Brunus Nolanus; 1548 – 17 February 1600), born Filippo Bruno, was an Italian Dominican friar, philosopher, mathematician, poet, and cosmological theorist.

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Giovanni Battista Riccioli

Giovanni Battista Riccioli (17 April 1598 – 25 June 1671) was an Italian astronomer and a Catholic priest in the Jesuit order.

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Gravity assist

In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist maneuver, or swing-by is the use of the relative movement (e.g. orbit around the Sun) and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.

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Helios

Helios (Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek) is the god and personification of the Sun in Greek mythology.

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Hellenistic period

The Hellenistic period covers the period of Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year.

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Heraclides Ponticus

Heraclides Ponticus (Ἡρακλείδης ὁ Ποντικός Herakleides; c. 390 BC – c. 310 BC) was a Greek philosopher and astronomer who was born in Heraclea Pontica, now Karadeniz Ereğli, Turkey, and migrated to Athens.

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Heresy

Heresy is any belief or theory that is strongly at variance with established beliefs or customs, in particular the accepted beliefs of a church or religious organization.

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Hicetas

Hicetas (Ἱκέτας or Ἱκέτης; c. 400 – c. 335 BC) was a Greek philosopher of the Pythagorean School.

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Hipparchus

Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos) was a Greek astronomer, geographer, and mathematician.

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Hypothesis

A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon.

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Ibn al-Haytham

Hasan Ibn al-Haytham (Latinized Alhazen; full name أبو علي، الحسن بن الحسن بن الهيثم) was an Arab mathematician, astronomer, and physicist of the Islamic Golden Age.

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Ibn al-Shatir

ʿAlāʾ al‐Dīn ʿAlī ibn Ibrāhīm known as Ibn al-Shatir or Ibn ash-Shatir (ابن الشاطر; 1304–1375) was an Arab astronomer, mathematician and engineer.

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Ilkhanate

The Ilkhanate, also spelled Il-khanate (ایلخانان, Ilxānān; Хүлэгийн улс, Hu’legīn Uls), was established as a khanate that formed the southwestern sector of the Mongol Empire, ruled by the Mongol House of Hulagu.

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Index Librorum Prohibitorum

The Index Librorum Prohibitorum (List of Prohibited Books) was a list of publications deemed heretical, or contrary to morality by the Sacred Congregation of the Index (a former Dicastery of the Roman Curia) and thus Catholics were forbidden to read them.

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Indian astronomy

Indian astronomy has a long history stretching from pre-historic to modern times.

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Inertial frame of reference

An inertial frame of reference in classical physics and special relativity is a frame of reference in which a body with zero net force acting upon it is not accelerating; that is, such a body is at rest or it is moving at a constant speed in a straight line.

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Inquisition

The Inquisition was a group of institutions within the government system of the Catholic Church whose aim was to combat public heresy committed by baptized Christians.

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Isaac Newton

Sir Isaac Newton (25 December 1642 – 20 March 1726/27) was an English mathematician, astronomer, theologian, author and physicist (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time, and a key figure in the scientific revolution.

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Isis (journal)

Isis is a quarterly peer-reviewed academic journal published by the University of Chicago Press.

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James Bradley

James Bradley FRS (March 1693 – 13 July 1762) was an English astronomer and priest and served as Astronomer Royal from 1742, succeeding Edmond Halley.

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Johann Albrecht Widmannstetter

Johann Albrecht Widmannstetter, also called Widmannstadt, Johannes Albertus or Widmestadius, (1506 in Nellingen/Blaubeuren near Ulm – March 28, 1557 in Regensburg), was a German humanist, orientalist, philologist, and theologian.

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Johann Jacob Zimmermann

Johann Jacob Zimmermann (November 25, 1642 – 1693) was a German nonconformist theologian, millenarian, mathematician, and astronomer.

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Johannes Kepler

Johannes Kepler (December 27, 1571 – November 15, 1630) was a German mathematician, astronomer, and astrologer.

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John Calvin

John Calvin (Jean Calvin; born Jehan Cauvin; 10 July 150927 May 1564) was a French theologian, pastor and reformer in Geneva during the Protestant Reformation.

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John Louis Emil Dreyer

John Louis Emil Dreyer (February 13, 1852 – September 14, 1926) was a Danish-Irish astronomer.

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Joseph Solomon Delmedigo

Joseph Solomon Delmedigo (or Del Medigo), also known as Yashar Mi-Qandia (ישר מקנדיא) (16 June 1591 – 16 October 1655), was a rabbi, author, physician, mathematician, and music theorist.

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Judah Loew ben Bezalel

Judah Loew ben Bezalel, alt.

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Jupiter

Jupiter is the fifth planet from the Sun and the largest in the Solar System.

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Kepler's laws of planetary motion

In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun.

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Kerala School of Astronomy and Mathematics

The Kerala School of Astronomy and Mathematics was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Kerala, India, which included among its members: Parameshvara, Neelakanta Somayaji, Jyeshtadeva, Achyuta Pisharati, Melpathur Narayana Bhattathiri and Achyuta Panikkar.

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King James Version

The King James Version (KJV), also known as the King James Bible (KJB) or simply the Version (AV), is an English translation of the Christian Bible for the Church of England, begun in 1604 and completed in 1611.

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Léon Foucault

Jean Bernard Léon Foucault (18 September 1819 – 11 February 1868) was a French physicist best known for his demonstration of the Foucault pendulum, a device demonstrating the effect of the Earth's rotation.

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Letter to the Grand Duchess Christina

The "Letter to The Grand Duchess Christina" is an essay written in 1615 by Galileo Galilei.

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Letters on Sunspots

Letters on Sunspots (Istoria e Dimostrazioni intorno alle Macchie Solari) was a pamphlet written by Galileo Galilei in 1612 and published in Rome by the Accademia dei Lincei in 1613.

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List of Muslim astronomers

A Muslim astronomer is an astronomer who professes Islam and/or is engaged in Islamic astronomy.

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Lucio Russo

Lucio Russo (born 22 November 1944) is an Italian physicist, mathematician and historian of science.

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Lunar eclipse

A lunar eclipse occurs when the Moon passes directly behind Earth and into its shadow.

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Lutheranism

Lutheranism is a major branch of Protestant Christianity which identifies with the theology of Martin Luther (1483–1546), a German friar, ecclesiastical reformer and theologian.

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Mach's principle

In theoretical physics, particularly in discussions of gravitation theories, Mach's principle (or Mach's conjecture) is the name given by Einstein to an imprecise hypothesis often credited to the physicist and philosopher Ernst Mach.

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Macrobius

Macrobius, fully Macrobius Ambrosius Theodosius, also known as Theodosius, was a Roman provincial who lived during the early fifth century, at the transition of the Roman to the Byzantine Empire, and when Latin was as widespread as Greek among the elite.

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Magnitude (astronomy)

In astronomy, magnitude is a logarithmic measure of the brightness of an object in a defined passband, often in the visible or infrared spectrum, but sometimes across all wavelengths.

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Maragheh observatory

Maragheh observatory (رصدخانه مراغه), was an institutionalized astronomical observatory which was established in 1259 CE under the patronage of the Ilkhanid Hulagu and the directorship of Nasir al-Din al-Tusi, a Persian scientist and astronomer.

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Mars

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

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Martianus Capella

Martianus Minneus Felix Capella was a Latin prose writer of Late Antiquity (fl. c. 410–420), one of the earliest developers of the system of the seven liberal arts that structured early medieval education.

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Martin Luther

Martin Luther, (10 November 1483 – 18 February 1546) was a German professor of theology, composer, priest, monk, and a seminal figure in the Protestant Reformation.

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Mathematical model

A mathematical model is a description of a system using mathematical concepts and language.

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Mechanical energy

In physical sciences, mechanical energy is the sum of potential energy and kinetic energy.

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Menachem Mendel Schneerson

Menachem Mendel Schneerson (April 18, 1902 OS – June 12, 1994 / AM 11 Nissan 5662 – 3 Tammuz 5754), known to many as the Lubavitcher Rebbe or simply as the Rebbe, was a Russian Empire–born American Orthodox Jewish rabbi, and the last rebbe of the Lubavitcher Hasidic dynasty.

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Mercury (planet)

Mercury is the smallest and innermost planet in the Solar System.

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Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

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Moon

The Moon is an astronomical body that orbits planet Earth and is Earth's only permanent natural satellite.

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Moses Sofer

Moses Schreiber (1762–1839), known to his own community and Jewish posterity in the Hebrew translation as Moshe Sofer, also known by his main work Chatam Sofer, Chasam Sofer or Hatam Sofer, (trans. Seal of the Scribe and acronym for Chiddushei Torat Moshe Sofer), was one of the leading Orthodox rabbis of European Jewry in the first half of the nineteenth century.

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Muʾayyad al-Dīn al-ʿUrḍī

Al-Urdi (full name: Muʾayyad (al‐Milla wa‐) al‐Dīn (Muʾayyad ibn Barīk) al‐ʿUrḍī (al‐ʿĀmirī al‐Dimašqī) (مؤيد (الملة و) الدين (مؤيد ابن بريك) ألعرضي (العامري الدمشقي d. 1266) was a medieval Syrian-Arab astronomer.

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Muhammad ibn Zakariya al-Razi

Abū Bakr Muhammad ibn Zakariyyā al-Rāzī (Abūbakr Mohammad-e Zakariyyā-ye Rāzī, also known by his Latinized name Rhazes or Rasis) (854–925 CE), was a Persian polymath, physician, alchemist, philosopher, and important figure in the history of medicine.

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Najm al-Dīn al-Qazwīnī al-Kātibī

Najm al-Dīn al-Qazwīnī al-Kātibī (died AH 675 / 1276 CE) was a Persian Islamic philosopher and logician of the Shafi`i school.

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Nasir al-Din al-Tusi

Muhammad ibn Muhammad ibn al-Hasan al-Tūsī (محمد بن محمد بن حسن طوسی‎ 18 February 1201 – 26 June 1274), better known as Nasir al-Din Tusi (نصیر الدین طوسی; or simply Tusi in the West), was a Persian polymath, architect, philosopher, physician, scientist, and theologian.

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Natural philosophy

Natural philosophy or philosophy of nature (from Latin philosophia naturalis) was the philosophical study of nature and the physical universe that was dominant before the development of modern science.

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Natural science

Natural science is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on empirical evidence from observation and experimentation.

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New Latin

New Latin (also called Neo-Latin or Modern Latin) was a revival in the use of Latin in original, scholarly, and scientific works between c. 1375 and c. 1900.

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Newton's law of universal gravitation

Newton's law of universal gravitation states that a particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

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Newton's laws of motion

Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics.

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Nicholas of Cusa

Nicholas of Cusa (1401 – 11 August 1464), also referred to as Nicholas of Kues and Nicolaus Cusanus, was a German philosopher, theologian, jurist, and astronomer.

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Nicolaus Copernicus

Nicolaus Copernicus (Mikołaj Kopernik; Nikolaus Kopernikus; Niklas Koppernigk; 19 February 1473 – 24 May 1543) was a Renaissance-era mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe, likely independently of Aristarchus of Samos, who had formulated such a model some eighteen centuries earlier.

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Nicole Oresme

Nicole Oresme (c. 1320–1325 – July 11, 1382), also known as Nicolas Oresme, Nicholas Oresme, or Nicolas d'Oresme, was a significant philosopher of the later Middle Ages.

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Nikolaus von Schönberg

Nikolaus von Schönberg (11 August 1472 – 7 September 1537) was a German Archbishop of Capua.

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Nilakantha Somayaji

Kelallur Nilakantha Somayaji (also referred to as Kelallur Comatiri; 14 June 1444 – 1544) was a major mathematician and astronomer of the Kerala school of astronomy and mathematics in India.

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Nur ad-Din al-Bitruji

Nur ad-Din al-Bitruji (also spelled Nur al-Din Ibn Ishaq Al-Betrugi and Abu Ishâk ibn al-Bitrogi; another spelling is al Bidrudschi) (known in the West by the Latinized name of Alpetragius) (died c. 1204) was a Spanish-Arab astronomer and a Qadi in al-Andalus.

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On the Sizes and Distances (Aristarchus)

On the Sizes and Distances (of the Sun and Moon) (Περὶ μεγεθῶν καὶ ἀποστημάτων, Peri megethon kai apostematon) is widely accepted as the only extant work written by Aristarchus of Samos, an ancient Greek astronomer who lived circa 310–230 BCE.

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Otto E. Neugebauer

Otto Eduard Neugebauer (May 26, 1899 – February 19, 1990) was an Austrian American mathematician and historian of science who became known for his research on the history of astronomy and the other exact sciences in antiquity and into the Middle Ages.

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Padua

Padua (Padova; Pàdova) is a city and comune in Veneto, northern Italy.

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Paganism

Paganism is a term first used in the fourth century by early Christians for populations of the Roman Empire who practiced polytheism, either because they were increasingly rural and provincial relative to the Christian population or because they were not milites Christi (soldiers of Christ).

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Parallax

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.

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Philip Melanchthon

Philip Melanchthon (born Philipp Schwartzerdt; 16 February 1497 – 19 April 1560) was a German Lutheran reformer, collaborator with Martin Luther, the first systematic theologian of the Protestant Reformation, intellectual leader of the Lutheran Reformation, and an influential designer of educational systems.

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Philolaus

Philolaus (Φιλόλαος, Philólaos) was a Greek Pythagorean and pre-Socratic philosopher.

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Philosophiæ Naturalis Principia Mathematica

Philosophiæ Naturalis Principia Mathematica (Latin for Mathematical Principles of Natural Philosophy), often referred to as simply the Principia, is a work in three books by Isaac Newton, in Latin, first published 5 July 1687.

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Philosophy

Philosophy (from Greek φιλοσοφία, philosophia, literally "love of wisdom") is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language.

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Physical body

In physics, a physical body or physical object (or simply a body or object) is an identifiable collection of matter, which may be constrained by an identifiable boundary, and may move as a unit by translation or rotation, in 3-dimensional space.

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Pinhole camera

A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole – effectively a light-proof box with a small hole in one side.

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Planet

A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.

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Plutarch

Plutarch (Πλούταρχος, Ploútarkhos,; c. CE 46 – CE 120), later named, upon becoming a Roman citizen, Lucius Mestrius Plutarchus, (Λούκιος Μέστριος Πλούταρχος) was a Greek biographer and essayist, known primarily for his Parallel Lives and Moralia.

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Pontifex maximus

The Pontifex Maximus or pontifex maximus (Latin, "greatest priest") was the chief high priest of the College of Pontiffs (Collegium Pontificum) in ancient Rome.

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Pope Alexander VII

Pope Alexander VII (13 February 159922 May 1667), born Fabio Chigi, was Pope from 7 April 1655 to his death in 1667.

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Pope Clement VII

Pope Clement VII (26 May 1478 – 25 September 1534), born Giulio di Giuliano de' Medici, was head of the Catholic Church and ruler of the Papal States from 19 November 1523 to his death on 25 September 1534.

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Pope Clement XIV

Pope Clement XIV (Clemens XIV; 31 October 1705 – 22 September 1774), born Giovanni Vincenzo Antonio Ganganelli, was head of the Catholic Church and ruler of the Papal States from 19 May 1769 to his death in 1774.

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Pope Leo XIII

Pope Leo XIII (Leone; born Vincenzo Gioacchino Raffaele Luigi Pecci; 2 March 1810 – 20 July 1903) was head of the Catholic Church from 20 February 1878 to his death.

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Pope Paul III

Pope Paul III (Paulus III; 29 February 1468 – 10 November 1549), born Alessandro Farnese, was Pope from 13 October 1534 to his death in 1549.

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Pope Pius VII

Pope Pius VII (14 August 1742 – 20 August 1823), born Barnaba Niccolò Maria Luigi Chiaramonti, was head of the Catholic Church and ruler of the Papal States from 14 March 1800 to his death in 1823.

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Pope Urban VIII

Pope Urban VIII (Urbanus VIII; baptised 5 April 1568 – 29 July 1644) reigned as Pope from 6 August 1623 to his death in 1644.

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Popular Astronomy (US magazine)

Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.

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Pretzel

A Pretzel (Breze(l)) is a type of baked bread product made from dough most commonly shaped into a twisted knot.

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Principle of relativity

In physics, the principle of relativity is the requirement that the equations describing the laws of physics have the same form in all admissible frames of reference.

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Proclus

Proclus Lycaeus (8 February 412 – 17 April 485 AD), called the Successor (Greek Πρόκλος ὁ Διάδοχος, Próklos ho Diádokhos), was a Greek Neoplatonist philosopher, one of the last major classical philosophers (see Damascius).

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Ptolemy

Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.

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Pythagoreanism

Pythagoreanism originated in the 6th century BC, based on the teachings and beliefs held by Pythagoras and his followers, the Pythagoreans, who were considerably influenced by mathematics and mysticism.

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Radical skepticism

Radical skepticism or radical scepticism is the philosophical position that knowledge is most likely impossible.

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Reality

Reality is all of physical existence, as opposed to that which is merely imaginary.

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Regiomontanus

Johannes Müller von Königsberg (6 June 1436 – 6 July 1476), better known as Regiomontanus, was a mathematician and astronomer of the German Renaissance, active in Vienna, Buda and Nuremberg.

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Relative velocity

The relative velocity \vec_ (also \vec_ or \vec_) is the velocity of an object or observer B in the rest frame of another object or observer A.

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Renaissance

The Renaissance is a period in European history, covering the span between the 14th and 17th centuries.

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René Descartes

René Descartes (Latinized: Renatus Cartesius; adjectival form: "Cartesian"; 31 March 1596 – 11 February 1650) was a French philosopher, mathematician, and scientist.

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Retrograde and prograde motion

Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is the central object (right figure).

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Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.

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Robert Bellarmine

Saint Robert Bellarmine, S.J. (Roberto Francesco Romolo Bellarmino; 4 October 1542 – 17 September 1621) was an Italian Jesuit and a Cardinal of the Catholic Church.

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Roman Catholic Archdiocese of Capua

The Roman Catholic Archdiocese of Capua (Archidioecesis Capuana) is an archdiocese (originally a suffragan bishopric) of the Roman Catholic Church in Italy, but its archbishop no longer holds metropolitan rank and has no ecclesiastical province.

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Roman College

The Roman College (Collegio Romano) was a school established by St.

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Scientific modelling

Scientific modelling is a scientific activity, the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate by referencing it to existing and usually commonly accepted knowledge.

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Seleucid Empire

The Seleucid Empire (Βασιλεία τῶν Σελευκιδῶν, Basileía tōn Seleukidōn) was a Hellenistic state ruled by the Seleucid dynasty, which existed from 312 BC to 63 BC; Seleucus I Nicator founded it following the division of the Macedonian empire vastly expanded by Alexander the Great.

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Seleucus of Seleucia

Seleucus of Seleucia (Σέλευκος Seleukos; born c. 190 BC; fl. c. 150 BC) was a Hellenistic astronomer and philosopher.

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Shlomo Benizri

Shlomo Benizri (שלמה בניזרי; born 7 February 1961) is an Israeli politician and member of the Shas party.

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Shlomo Pines

Shlomo Pines (August 5, 1908 in Charenton-le-Pont – January 9, 1990 in Jerusalem) was an Israeli scholar of Jewish and Islamic philosophy, best known for his English translation of Maimonides' Guide of the Perplexed.

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Simplicius of Cilicia

Simplicius of Cilicia (Σιμπλίκιος ὁ Κίλιξ; c. 490 – c. 560) was a disciple of Ammonius Hermiae and Damascius, and was one of the last of the Neoplatonists.

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Solar eclipse

A solar eclipse (as seen from the planet Earth) is a type of eclipse that occurs when the Moon passes between the Sun and Earth, and when the Moon fully or partially blocks ("occults") the Sun.

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Solar System

The Solar SystemCapitalization of the name varies.

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Spacecraft

A spacecraft is a vehicle or machine designed to fly in outer space.

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Spherical Earth

The earliest reliably documented mention of the spherical Earth concept dates from around the 6th century BC when it appeared in ancient Greek philosophy but remained a matter of speculation until the 3rd century BC, when Hellenistic astronomy established the spherical shape of the Earth as a physical given.

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Springer Science+Business Media

Springer Science+Business Media or Springer, part of Springer Nature since 2015, is a global publishing company that publishes books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing.

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Stanford Encyclopedia of Philosophy

The Stanford Encyclopedia of Philosophy (SEP) combines an online encyclopedia of philosophy with peer-reviewed publication of original papers in philosophy, freely accessible to Internet users.

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Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Stellar parallax

Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.

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Sun

The Sun is the star at the center of the Solar System.

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Sundial

A sundial is a device that tells the time of day when there is sunlight by the apparent position of the Sun in the sky.

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Talmud

The Talmud (Hebrew: תַּלְמוּד talmūd "instruction, learning", from a root LMD "teach, study") is the central text of Rabbinic Judaism and the primary source of Jewish religious law and theology.

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Tanakh

The Tanakh (or; also Tenakh, Tenak, Tanach), also called the Mikra or Hebrew Bible, is the canonical collection of Jewish texts, which is also a textual source for the Christian Old Testament.

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Tantrasamgraha

Tantrasamgraha, or Tantrasangraha, (literally, A Compilation of the System) is an important astronomical treatise written by Nilakantha Somayaji, an astronomer/mathematician belonging to the Kerala school of astronomy and mathematics.

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Telescope

A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).

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Thābit ibn Qurra

(ثابت بن قره, Thebit/Thebith/Tebit; 826 – February 18, 901) was a Syrian Arab Sabian mathematician, physician, astronomer, and translator who lived in Baghdad in the second half of the ninth century during the time of Abbasid Caliphate.

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The Freethinker (journal)

The Freethinker was a British secular humanist magazine, founded by G.W. Foote in 1881.

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The Sand Reckoner

The Sand Reckoner (Ψαμμίτης, Psammites) is a work by Archimedes in which he set out to determine an upper bound for the number of grains of sand that fit into the universe.

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The World (Descartes)

The World, also called Treatise on the Light (French title: Traité du monde et de la lumière), is a book by René Descartes (1596–1650).

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Theologian of the Pontifical Household

In the Roman Catholic Church, Theologian of the Pontifical Household (Pontificalis Domus Doctor Theologus) is a Roman Curial office which has always been entrusted to a Friar Preacher of the Dominican Order and may be described as the pope's theologian.

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Thomas Henderson (astronomer)

Thomas Henderson FRSE FRS FRAS (28 December 1798 – 23 November 1844) was a Scottish astronomer and mathematician noted for being the first person to measure the distance to Alpha Centauri, the major component of the nearest stellar system to Earth, the first to determine the parallax of a fixed star, and for being the first Astronomer Royal for Scotland.

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Tide

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth.

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Tobias Cohn

Tobias Cohn or Tobias Kohn (in Hebrew, Toviyyah ben Moshe ha-Kohen, Tuvia Harofeh - Tuvia the doctor; in Polish, Tobiasz Kohn) (also referred to as Toviyah Kats) (1652-1729) was a Polish-Jewish physician of the seventeenth and eighteenth centuries.

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Trigonometry

Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles.

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Tusi couple

The Tusi couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle.

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Tycho Brahe

Tycho Brahe (born Tyge Ottesen Brahe;. He adopted the Latinized form "Tycho Brahe" (sometimes written Tÿcho) at around age fifteen. The name Tycho comes from Tyche (Τύχη, meaning "luck" in Greek, Roman equivalent: Fortuna), a tutelary deity of fortune and prosperity of ancient Greek city cults. He is now generally referred to as "Tycho," as was common in Scandinavia in his time, rather than by his surname "Brahe" (a spurious appellative form of his name, Tycho de Brahe, only appears much later). 14 December 154624 October 1601) was a Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical and planetary observations.

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Tychonic system

The Tychonic system (or Tychonian system) is a model of the Solar system published by Tycho Brahe in the late 16th century which combines what he saw as the mathematical benefits of the Copernican system with the philosophical and "physical" benefits of the Ptolemaic system.

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Ulugh Beg Observatory

The Ulugh Beg Observatory is an observatory in Samarkand, Uzbekistan.

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UNESCO

The United Nations Educational, Scientific and Cultural Organization (UNESCO; Organisation des Nations unies pour l'éducation, la science et la culture) is a specialized agency of the United Nations (UN) based in Paris.

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Universe

The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

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University of Chicago Press

The University of Chicago Press is the largest and one of the oldest university presses in the United States.

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Varāhamihira

Vārāhamihira (505–587 CE), also called Vārāha or Mihira, was an Indian astronomer, mathematician, and astrologer who lived in Ujjain.

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Vatican Observatory

The Vatican Observatory (Specola Vaticana) is an astronomical research and educational institution supported by the Holy See.

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Vega

Vega, also designated Alpha Lyrae (α Lyrae, abbreviated Alpha Lyr or α Lyr), is the brightest star in the constellation of Lyra, the fifth-brightest star in the night sky, and the second-brightest star in the northern celestial hemisphere, after Arcturus.

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Velocity

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

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Venus

Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.

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William Herschel

Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.

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61 Cygni

61 Cygni Not to be confused with 16 Cygni, a more distant system containing two G-type stars harboring the gas giant planet 16 Cygni Bb.

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Redirects here:

Copernican heliocentric system, Copernicanism, Heleocentric theory, Heliocentric, Heliocentric Coordinates, Heliocentric Model, Heliocentric System, Heliocentric Theory, Heliocentric model, Heliocentric solar system, Heliocentric system, Heliocentric theory, Heliocentric universe, Heliocentricism, Heliocentricity, Revolution of the Earth, Sun centred universe, Sun-centered universe, Sun-centred Universe.

References

[1] https://en.wikipedia.org/wiki/Heliocentrism

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