307 relations: A Treatise on the Astrolabe, Absolute magnitude, Achilles, Aegean Sea, Aitken Double Star Catalogue, Aldebaran, Alfred, Lord Tennyson, Allsvenskan, Almagest, Alpha, Alpha Centauri, Alpha Coronae Borealis, Alvan Graham Clark, Am star, An-Najm, Ancient Egypt, Ancient Egyptian deities, Ancient Greece, Ancient Greek, Antares, Apaosha, Apparent magnitude, Apsis, Aratus, Archaic Greece, Arcturus, Association football, Asterism (astronomy), Astrolabe, Astrology, Astrometry, Astronomical interferometer, Astronomical spectroscopy, Astronomical unit, Astronomy & Astrophysics, Avesta, Avestan, Avienus, École pratique des hautes études, Bayer designation, Behenian fixed star, Bering Strait, Beryl, Beta Aurigae, Beta Crateris, Beta Eridani, Beta Serpentis, Betelgeuse, Binary star, Blackfoot Confederacy, ..., Bright Star Catalogue, Brown dwarf, Cairo, Cangin languages, Canis Major, Canopus, Cape of Good Hope, Centre de données astronomiques de Strasbourg, Chandra X-ray Observatory, Charles Lindbergh, Cherokee, Chinese astronomy, Christiaan Huygens, Cicero, Circumpolar star, CNO cycle, Constellation, Convection zone, Coptic calendar, Current Anthropology, Dante Alighieri, Daylight, Dearborn Observatory, Declination, Dendera, Dendera Temple complex, Dog days, Dogon people, Duat, Durchmusterung, Earth, Ecliptic, Edmond Halley, Egyptian calendar, Ejnar Hertzsprung, Energy (esotericism), Epoch (astronomy), Eta Carinae, Ethnic group, Fasti (poem), Ferdowsi, Fiji, First Fleet, Flag of Brazil, Flagship, Flamsteed designation, Flooding of the Nile, Friedrich Bessel, Futuna (Wallis and Futuna), Gaia 1, Geoffrey Chaucer, Germanicus, Giant planet, Giuseppe Piazzi, Gliese Catalogue of Nearby Stars, Google Books, Great refractor, Gregory of Tours, Harry Potter, Hathor, Hawaii, Heinrich Cornelius Agrippa, Heliacal rising, Henry Draper Catalogue, Hesiod, Hipparcos, HMS Sirius (1786), Homer, Horus, Hubble Space Telescope, Hyades (star cluster), IAU Working Group on Star Names, Ibn Kathir, IK Sirius Fotboll, Iliad, Infrared excess, Intensity interferometer, International Astronomical Union, International Celestial Reference System, Inuit, Iran, IRAS, Isis, Jacques Cassini, Jodrell Bank Observatory, Johann Bayer, John Herschel, John Milton, Julian calendar, Juniper, Jupiter, Karlheinz Stockhausen, Kea (island), Kelvin, Leap year, Light-year, List of brightest stars, List of nearest stars and brown dwarfs, Lockheed Model 8 Sirius, Lombardy, Luminosity, Lyndon, Rutland, Macquarie University, Magnetic field, Main sequence, Malayalam, Mali, Mangaia, Manihiki, Marcel Griaule, Marcus Manilius, Marquesas Islands, Mars, Masters of the Ancient Wisdom, Mato Grosso, Mauritania, Māori people, Mercury (planet), Mesori, Metallicity, Middle Ages, Middle Persian, Minute and second of arc, Mitsubishi Motors, Mitsubishi Sirius engine, Molecular cloud, Monthly Notices of the Royal Astronomical Society, Mount Wilson Observatory, Native Hawaiians, Nevil Maskelyne, Nicolas-Louis de Lacaille, Night sky, Nile, Noah Brosch, Northern Hemisphere, Northernmost settlements, Open cluster, Order of the Phoenix (fictional organisation), Orion (constellation), Orion (mythology), Osiris, Ovid, Pacific Ocean, Paris, Parsec, Pawnee people, Persian language, Persian literature, Persian mythology, Philosophical Transactions of the Royal Society, Pinyin, Pleiades, Pleiades in folklore and literature, Plutarch, Pollux (star), Polynesian culture, Polynesians, Precession, Procyon, Proper motion, Ptolemy, Pukapuka, Puppis, Quran, Rabies, Radial velocity, Red dwarf, Red giant, Redshift, Religious text, Richard Q. Twiss, Rigel, Robert Hanbury Brown, Robert K. G. Temple, Robigalia, Romanization, Romanization of Japanese, Royal Astronomical Society, Royal Australian Navy, Royal Navy, Royal Society, Rudra, Rust (fungus), Rutland, Sabarimala, Sah (god), Saint Petersburg, Saltigue, Sanat Kumara, Sanskrit, Satellite radio, Satis (goddess), Saturn, Science fiction, Seneca the Younger, Senegal, Serer language, Serer people, Serer religion, Seri people, Shahnameh, Shiva, Sirius in fiction, Sirius Satellite Radio, Smithsonian Institution, Society Islands, Solar sail, Solar System, Sopdet, Sopdu, Sothic cycle, Southern Hemisphere, Spectral line, Stanley Lombardo, Star catalogue, Star system, Stellar classification, Stellar evolution, Stellar parallax, Stellar rotation, Summer solstice, Surah, Syncretism, The Gambia, The Princess (Tennyson poem), The Sirius Mystery, Theosophy (Blavatskian), Thomas Barker (meteorologist), Thomas Henderson (astronomer), Thomas Jefferson Jackson See, Thomas Maclear, Tishtrya, Tohono O'odham, Tropical year, Troy, Tuamotus, Twinkling, Uppsala, Uranus, Ursa Major, Ursa Major Moving Group, Vega, Venus, Vertex (geometry), VLT Survey Telescope, Voyager 2, Walter Sydney Adams, Well (Chinese constellation), Wergaia, White dwarf, William Huggins, Winter solstice, Winter Triangle, Works and Days, Yazata, Zeus, Zoroastrianism. Expand index (257 more) » « Shrink index
A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer.
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
In Greek mythology, Achilles or Achilleus (Ἀχιλλεύς, Achilleus) was a Greek hero of the Trojan War and the central character and greatest warrior of Homer's Iliad.
The Aegean Sea (Αιγαίο Πέλαγος; Ege Denizi) is an elongated embayment of the Mediterranean Sea located between the Greek and Anatolian peninsulas, i.e., between the mainlands of Greece and Turkey.
The Aitken Double Star Catalogue, or ADS, is a star catalogue of double stars.
Aldebaran, designated Alpha Tauri (α Tauri, abbreviated Alpha Tau, α Tau), is an orange giant star located about 65 light-years from the Sun in the zodiac constellation of Taurus.
Alfred Tennyson, 1st Baron Tennyson (6 August 1809 – 6 October 1892) was Poet Laureate of Great Britain and Ireland during much of Queen Victoria's reign and remains one of the most popular British poets.
Allsvenskan (The All-Swedish, also known as Fotbollsallsvenskan, The Football All-Swedish) is a Swedish professional league for men's association football clubs.
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.
Alpha (uppercase, lowercase; ἄλφα, álpha, modern pronunciation álfa) is the first letter of the Greek alphabet.
Alpha Centauri (α Centauri, abbreviated Alf Cen or α Cen) is the star system closest to the Solar System, being from the Sun.
Alpha Coronae Borealis (α Coronae Borealis, abbreviated Alpha CrB, α CrB), also named Alphecca, is a binary star in the constellation of Corona Borealis.
Alvan Graham Clark (July 10, 1832 – June 9, 1897) was an American astronomer and telescope-maker.
An Am star or metallic-line star is a type of chemically peculiar star of spectral type A whose spectrum has strong and often variable absorption lines of metals such as zinc, strontium, zirconium, and barium, and deficiencies of others, such as calcium and scandium.
Sūrat an-Najm (سورة النجم, "The Star") is the 53rd sura of the Qur'an with 62 ayat.
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.
Ancient Egyptian deities are the gods and goddesses worshipped in ancient Egypt.
Ancient Greece was a civilization belonging to a period of Greek history from the Greek Dark Ages of the 13th–9th centuries BC to the end of antiquity (AD 600).
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.
Antares, also designated Alpha Scorpii (α Scorpii, abbreviated Alpha Sco, α Sco), is on average the fifteenth-brightest star in the night sky, and the brightest star in the constellation of Scorpius.
Apaosha (Apaoša, Apauša) is the Avestan language name of Zoroastrianism's demon of drought.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
An apsis (ἁψίς; plural apsides, Greek: ἁψῖδες) is an extreme point in the orbit of an object.
Aratus (Ἄρατος ὁ Σολεύς; ca. 315 BC/310 BC240) was a Greek didactic poet.
Archaic Greece was the period in Greek history lasting from the eighth century BC to the second Persian invasion of Greece in 480 BC, following the Greek Dark Ages and succeeded by the Classical period.
Association football, more commonly known as football or soccer, is a team sport played between two teams of eleven players with a spherical ball.
In observational astronomy, an asterism is a popular known pattern or group of stars that are recognised in the night sky.
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.
Astrology is the study of the movements and relative positions of celestial objects as a means for divining information about human affairs and terrestrial events.
Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
An astronomical interferometer is an array of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide higher resolution images of astronomical objects such as stars, nebulas and galaxies by means of interferometry.
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
The Avesta is the primary collection of religious texts of Zoroastrianism, composed in the otherwise unrecorded Avestan language.
Avestan, also known historically as Zend, is a language known only from its use as the language of Zoroastrian scripture (the Avesta), from which it derives its name.
Avienus was a Latin writer of the 4th century AD.
The École pratique des hautes études, abbreviated EPHE, is a Grand Établissement in Paris, France, and a constituent college of PSL Research University.
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.
The Behenian fixed stars are a selection of fifteen stars considered especially useful for magical applications in the medieval astrology of Europe and the Arab world.
The Bering Strait (Берингов пролив, Beringov proliv, Yupik: Imakpik) is a strait of the Pacific, which borders with the Arctic to north.
Beryl is a mineral composed of beryllium aluminium cyclosilicate with the chemical formula Be3Al2(SiO3)6.
Beta Aurigae (β Aurigae, abbreviated Beta Aur, β Aur), also named Menkalinan, is a binary star system in the northern constellation of Auriga.
Beta Crateris, Latinized from β Crateris, is a binary star system in the southern constellation of Crater.
Beta Eridani (β Eridani, abbreviated Beta Eri, β Eri), also named Cursa, is the second-brightest star in the constellation of Eridanus, located in the northeast end of this constellation near the shared border with Orion.
Beta Serpentis, Latinized from β Serpentis, is a binary star system in the constellation Serpens, in its head (Serpens Caput).
Betelgeuse, also designated Alpha Orionis (α Orionis, abbreviated Alpha Ori, α Ori), is the ninth-brightest star in the night sky and second-brightest in the constellation of Orion.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
The Blackfoot Confederacy, Niitsitapi or Siksikaitsitapi (ᖹᐟᒧᐧᒣᑯ, meaning "the people" or "Blackfoot-speaking real people"Compare to Ojibwe: Anishinaabeg and Quinnipiac: Eansketambawg) is a historic collective name for the four bands that make up the Blackfoot or Blackfeet people: three First Nation band governments in the provinces of Saskatchewan, Alberta, and British Columbia, and one federally recognized Native American tribe in Montana, United States.
The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.
Brown dwarfs are substellar objects that occupy the mass range between the heaviest gas giant planets and the lightest stars, having masses between approximately 13 to 75–80 times that of Jupiter, or approximately to about.
Cairo (القاهرة) is the capital of Egypt.
The Cangin languages are spoken by 200,000 people (as of 2007) in a small area east of Dakar, Senegal.
Canis Major is a constellation in the southern celestial hemisphere.
Canopus, also designated Alpha Carinae (α Carinae, abbreviated Alpha Car, α Car), is the brightest star in the southern constellation of Carina, and the second-brightest star in the night-time sky, after Sirius.
The Cape of Good Hope (Kaap die Goeie Hoop, Kaap de Goede Hoop, Cabo da Boa Esperança) is a rocky headland on the Atlantic coast of the Cape Peninsula, South Africa.
The Centre de Données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.
The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a Flagship-class space observatory launched on STS-93 by NASA on July 23, 1999.
Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974), nicknamed Lucky Lindy, The Lone Eagle, and Slim was an American aviator, military officer, author, inventor, explorer, and environmental activist.
The Cherokee (translit or translit) are one of the indigenous peoples of the Southeastern Woodlands.
Astronomy in China has a long history, beginning from the Shang Dynasty (Chinese Bronze Age).
Christiaan Huygens (Hugenius; 14 April 1629 – 8 July 1695) was a Dutch physicist, mathematician, astronomer and inventor, who is widely regarded as one of the greatest scientists of all time and a major figure in the scientific revolution.
Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.
The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.
Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.
Christmas traditions vary from country to country.
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.
A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.
The CNO cycle (for carbon–nitrogen–oxygen) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction.
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
A convection zone, convective zone or convective region of a star is a layer which is unstable to convection.
The Coptic calendar, also called the Alexandrian calendar, is a liturgical calendar that was used by the Coptic Orthodox Church and is still used in Egypt.
Current Anthropology is a peer-reviewed anthropology academic journal published by the University of Chicago Press and sponsored by the Wenner-Gren Foundation for Anthropological Research.
Durante degli Alighieri, commonly known as Dante Alighieri or simply Dante (c. 1265 – 1321), was a major Italian poet of the Late Middle Ages.
Daylight, or the light of day, is the combination of all direct and indirect sunlight during the daytime.
The Dearborn Observatory is an astronomical observatory located on the Evanston campus of Northwestern University.
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.
Dendera (دندرة Dandarah; ⲛⲓⲧⲉⲛⲧⲱⲣⲓ), also spelled Denderah, ancient Iunet, Tentyris or Tentyra is a small town and former bishopric in Egypt situated on the west bank of the Nile, about south of Qena, on the opposite side of the river.
Dendera Temple complex (Ancient Egyptian: Iunet or Tantere; the 19th-century English spelling in most sources, including Belzoni, was Tentyra) is located about south-east of Dendera, Egypt.
The dog days or are the hot, sultry days of summer.
The Dogon are an ethnic group living in the central plateau region of Mali, in West Africa, south of the Niger bend, near the city of Bandiagara, in the Mopti region.
Duat (pronounced "do-aht") (also Tuat and Tuaut or Akert, Amenthes, Amenti, or Neter-khertet) was the realm of the dead in ancient Egyptian mythology.
In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.
Edmond (or Edmund) Halley, FRS (–) was an English astronomer, geophysicist, mathematician, meteorologist, and physicist.
The ancient Egyptian calendar was a solar calendar with a 365-day year.
Ejnar Hertzsprung (8 October 1873 – 21 October 1967) was a Danish chemist and astronomer born in Copenhagen.
The term energy is used by writers and practitioners of various esoteric forms of spirituality and alternative medicine to refer to a variety of phenomena.
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
Eta Carinae (η Carinae, abbreviated to η Car), formerly known as Eta Argus, is a stellar system containing at least two stars with a combined luminosity greater than five million times that of the Sun, located around 7,500 light-years (2,300 parsecs) distant in the constellation Carina.
An ethnic group, or an ethnicity, is a category of people who identify with each other based on similarities such as common ancestry, language, history, society, culture or nation.
The Fasti (Fastorum Libri Sex, "Six Books of the Calendar"), sometimes translated as The Book of Days or On the Roman Calendar, is a six-book Latin poem written by the Roman poet Ovid and published in 8 AD.
Abu ʾl-Qasim Firdowsi Tusi (c. 940–1020), or Ferdowsi (also transliterated as Firdawsi, Firdusi, Firdosi, Firdausi) was a Persian poet and the author of Shahnameh ("Book of Kings"), which is the world's longest epic poem created by a single poet, and the national epic of Greater Iran.
Fiji (Viti; Fiji Hindi: फ़िजी), officially the Republic of Fiji (Matanitu Tugalala o Viti; Fiji Hindi: फ़िजी गणराज्य), is an island country in Oceania in the South Pacific Ocean about northeast of New Zealand's North Island.
The First Fleet was the 11 ships that departed from Portsmouth, England, on 13 May 1787 to found the penal colony that became the first European settlement in Australia.
The flag of Brazil (Bandeira do Brasil), known in Portuguese as A Auriverde (The Yellow-and-green One), is a blue disc depicting a starry sky (which includes the Southern Cross) spanned by a curved band inscribed with the national motto "Ordem e Progresso" ("Order and Progress"), within a yellow rhombus, on a green field.
A flagship is a vessel used by the commanding officer of a group of naval ships, characteristically a flag officer entitled by custom to fly a distinguishing flag.
A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.
The flooding of the Nile has been an important natural cycle in Egypt since ancient times.
Friedrich Wilhelm Bessel (22 July 1784 – 17 March 1846) was a German astronomer, mathematician, physicist and geodesist.
Futuna is an 80 km2 island with 5,000 people and max.
Gaia 1 is a star cluster discovered in 2017 by the Gaia Space Observatory.
Geoffrey Chaucer (c. 1343 – 25 October 1400), known as the Father of English literature, is widely considered the greatest English poet of the Middle Ages.
Germanicus (Latin: Germanicus Julius Caesar; 24 May 15 BC – 10 October AD 19) was a member of the Julio-Claudian dynasty and a prominent general of the Roman Empire, who was known for his campaigns in Germania.
A giant planet is any massive planet.
Giuseppe Piazzi (16 July 1746 – 22 July 1826) was an Italian Catholic priest of the Theatine order, mathematician, and astronomer.
The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.
Google Books (previously known as Google Book Search and Google Print and by its codename Project Ocean) is a service from Google Inc. that searches the full text of books and magazines that Google has scanned, converted to text using optical character recognition (OCR), and stored in its digital database.
Great refractor refers to a large telescope with a lens, usually the largest refractor at an observatory with an equatorial mount.
Saint Gregory of Tours (30 November c. 538 – 17 November 594) was a Gallo-Roman historian and Bishop of Tours, which made him a leading prelate of the area that had been previously referred to as Gaul by the Romans. He was born Georgius Florentius and later added the name Gregorius in honour of his maternal great-grandfather. He is the primary contemporary source for Merovingian history. His most notable work was his Decem Libri Historiarum (Ten Books of Histories), better known as the Historia Francorum (History of the Franks), a title that later chroniclers gave to it, but he is also known for his accounts of the miracles of saints, especially four books of the miracles of St. Martin of Tours. St. Martin's tomb was a major pilgrimage destination in the 6th century, and St. Gregory's writings had the practical effect of promoting this highly organized devotion.
Harry Potter is a series of fantasy novels written by British author J. K. Rowling.
Hathor (or; Egyptian:; in Ἅθωρ, meaning "mansion of Horus")Hathor and Thoth: two key figures of the ancient Egyptian religion, Claas Jouco Bleeker, pp.
Hawaii (Hawaii) is the 50th and most recent state to have joined the United States, having received statehood on August 21, 1959.
Heinrich Cornelius Agrippa von Nettesheim (14 September 1486 – 18 February 1535) was a German polymath, physician, legal scholar, soldier, theologian, and occult writer.
The heliacal rising or star rise of a star, star cluster, or galaxy occurs annually when it becomes visible above the eastern horizon for a moment before sunrise, after a period of less than a year when it had not been visible.
The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.
Hesiod (or; Ἡσίοδος Hēsíodos) was a Greek poet generally thought by scholars to have been active between 750 and 650 BC, around the same time as Homer.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
HMS Sirius was the flagship of the First Fleet, which set out from Portsmouth, England, in 1787 to establish the first European colony in New South Wales, Australia.
Homer (Ὅμηρος, Hómēros) is the name ascribed by the ancient Greeks to the legendary author of the Iliad and the Odyssey, two epic poems that are the central works of ancient Greek literature.
Horus is one of the most significant ancient Egyptian deities.
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
The Hyades (Greek Ὑάδες, also known as Melotte 25 or Collinder 50) is the nearest open cluster and one of the best-studied star clusters.
The International Astronomical Union (IAU) established a Working Group on Star Names (WGSN) in May 2016 to catalog and standardize proper names for stars for the international astronomical community.
Ismail ibn Kathir (ابن كثير (Abridged name); Abu al-Fida' 'Imad Ad-Din Isma'il bin 'Umar bin Kathir al-Qurashi Al-Busrawi (إسماعيل بن عمر بن كثير القرشي الدمشقي أبو الفداء عماد الدين) – 1373) was a highly influential historian, exegete and scholar during the Mamluk era in Syria.
IK Sirius, more commonly known simply as Sirius, is a Swedish soccer club located in Uppsala.
The Iliad (Ἰλιάς, in Classical Attic; sometimes referred to as the Song of Ilion or Song of Ilium) is an ancient Greek epic poem in dactylic hexameter, traditionally attributed to Homer.
An infrared excess is a measurement of an astronomical source, typically a star, that in their spectral energy distribution has a greater measured infrared flux than expected by assuming the star is a blackbody radiator.
An intensity interferometer is the name given to devices that use the Hanbury Brown and Twiss effect.
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
The Inuit (ᐃᓄᐃᑦ, "the people") are a group of culturally similar indigenous peoples inhabiting the Arctic regions of Greenland, Canada and Alaska.
Iran (ایران), also known as Persia, officially the Islamic Republic of Iran (جمهوری اسلامی ایران), is a sovereign state in Western Asia. With over 81 million inhabitants, Iran is the world's 18th-most-populous country. Comprising a land area of, it is the second-largest country in the Middle East and the 17th-largest in the world. Iran is bordered to the northwest by Armenia and the Republic of Azerbaijan, to the north by the Caspian Sea, to the northeast by Turkmenistan, to the east by Afghanistan and Pakistan, to the south by the Persian Gulf and the Gulf of Oman, and to the west by Turkey and Iraq. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, give it geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic and cultural center. Iran is home to one of the world's oldest civilizations, beginning with the formation of the Elamite kingdoms in the fourth millennium BCE. It was first unified by the Iranian Medes in the seventh century BCE, reaching its greatest territorial size in the sixth century BCE, when Cyrus the Great founded the Achaemenid Empire, which stretched from Eastern Europe to the Indus Valley, becoming one of the largest empires in history. The Iranian realm fell to Alexander the Great in the fourth century BCE and was divided into several Hellenistic states. An Iranian rebellion culminated in the establishment of the Parthian Empire, which was succeeded in the third century CE by the Sasanian Empire, a leading world power for the next four centuries. Arab Muslims conquered the empire in the seventh century CE, displacing the indigenous faiths of Zoroastrianism and Manichaeism with Islam. Iran made major contributions to the Islamic Golden Age that followed, producing many influential figures in art and science. After two centuries, a period of various native Muslim dynasties began, which were later conquered by the Turks and the Mongols. The rise of the Safavids in the 15th century led to the reestablishment of a unified Iranian state and national identity, with the country's conversion to Shia Islam marking a turning point in Iranian and Muslim history. Under Nader Shah, Iran was one of the most powerful states in the 18th century, though by the 19th century, a series of conflicts with the Russian Empire led to significant territorial losses. Popular unrest led to the establishment of a constitutional monarchy and the country's first legislature. A 1953 coup instigated by the United Kingdom and the United States resulted in greater autocracy and growing anti-Western resentment. Subsequent unrest against foreign influence and political repression led to the 1979 Revolution and the establishment of an Islamic republic, a political system that includes elements of a parliamentary democracy vetted and supervised by a theocracy governed by an autocratic "Supreme Leader". During the 1980s, the country was engaged in a war with Iraq, which lasted for almost nine years and resulted in a high number of casualties and economic losses for both sides. According to international reports, Iran's human rights record is exceptionally poor. The regime in Iran is undemocratic, and has frequently persecuted and arrested critics of the government and its Supreme Leader. Women's rights in Iran are described as seriously inadequate, and children's rights have been severely violated, with more child offenders being executed in Iran than in any other country in the world. Since the 2000s, Iran's controversial nuclear program has raised concerns, which is part of the basis of the international sanctions against the country. The Joint Comprehensive Plan of Action, an agreement reached between Iran and the P5+1, was created on 14 July 2015, aimed to loosen the nuclear sanctions in exchange for Iran's restriction in producing enriched uranium. Iran is a founding member of the UN, ECO, NAM, OIC, and OPEC. It is a major regional and middle power, and its large reserves of fossil fuels – which include the world's largest natural gas supply and the fourth-largest proven oil reserves – exert considerable influence in international energy security and the world economy. The country's rich cultural legacy is reflected in part by its 22 UNESCO World Heritage Sites, the third-largest number in Asia and eleventh-largest in the world. Iran is a multicultural country comprising numerous ethnic and linguistic groups, the largest being Persians (61%), Azeris (16%), Kurds (10%), and Lurs (6%).
The Infrared Astronomical Satellite (IRAS) was the first-ever space telescope to perform a survey of the entire night sky at infrared wavelengths.
Isis was a major goddess in ancient Egyptian religion whose worship spread throughout the Greco-Roman world.
Jacques Cassini (18 February 1677 – 16 April 1756) was a French astronomer, son of the famous Italian astronomer Giovanni Domenico Cassini.
The Jodrell Bank Observatory (originally the Jodrell Bank Experimental Station, then the Nuffield Radio Astronomy Laboratories from 1966 to 1999) is a British observatory that hosts a number of radio telescopes, and is part of the Jodrell Bank Centre for Astrophysics at the University of Manchester.
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
Sir John Frederick William Herschel, 1st Baronet (7 March 1792 – 11 May 1871) was an English polymath, mathematician, astronomer, chemist, inventor, experimental photographer who invented the blueprint, and did botanical work.
John Milton (9 December 16088 November 1674) was an English poet, polemicist, man of letters, and civil servant for the Commonwealth of England under its Council of State and later under Oliver Cromwell.
The Julian calendar, proposed by Julius Caesar in 46 BC (708 AUC), was a reform of the Roman calendar.
Junipers are coniferous plants in the genus Juniperus of the cypress family Cupressaceae.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Karlheinz Stockhausen (22 August 1928 – 5 December 2007) was a German composer, widely acknowledged by critics as one of the most important but also controversial composers of the 20th and early 21st centuries.
Kea (Κέα), also known as or Tzia (Τζια) and in antiquity Keos (Κέως, Ceos), is a Greek island in the Cyclades archipelago in the Aegean Sea.
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
A leap year (also known as an intercalary year or bissextile year) is a calendar year containing one additional day (or, in the case of lunisolar calendars, a month) added to keep the calendar year synchronized with the astronomical or seasonal year.
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
This is a list of the brightest naked eye stars to +2.50 magnitude, as determined by their maximum, total, or combined apparent visual magnitudes as seen from Earth.
The following two lists include all the known stars and brown dwarfs that are within of the Sun, or were/will be within in the astronomically near past or future.
The Lockheed Model 8 Sirius was a single-engined, propeller-driven monoplane designed and built by Jack Northrop and Gerard Vultee while they were engineers at Lockheed in 1929, at the request of Charles Lindbergh.
Lombardy (Lombardia; Lumbardia, pronounced: (Western Lombard), (Eastern Lombard)) is one of the twenty administrative regions of Italy, in the northwest of the country, with an area of.
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
Lyndon is a small village in the county of Rutland in the East Midlands of England.
Macquarie University is a public research university based in Sydney, Australia, in the suburb of Macquarie Park.
A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
Malayalam is a Dravidian language spoken across the Indian state of Kerala by the Malayali people and it is one of 22 scheduled languages of India.
Mali, officially the Republic of Mali (République du Mali), is a landlocked country in West Africa, a region geologically identified with the West African Craton.
Mangaia (traditionally known as A'ua'u Enua, which means terraced) is the most southerly of the Cook Islands and the second largest, after Rarotonga.
Marcel Griaule (16 May 1898 – 23 February 1956) was a French anthropologist known for his studies of the Dogon people of West Africa, and for pioneering ethnographic field studies in France.
Marcus Manilius (fl. 1st century AD) was a Roman poet, astrologer, and author of a poem in five books called Astronomica.
The Marquesas Islands (Îles Marquises or Archipel des Marquises or Marquises; Marquesan: Te Henua (K)enana (North Marquesan) and Te FenuaEnata (South Marquesan), both meaning "the land of men") are a group of volcanic islands in French Polynesia, an overseas collectivity of France in the southern Pacific Ocean.
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.
The Masters of the Ancient Wisdom are reputed to be enlightened beings originally identified by the Theosophists Helena Blavatsky, Henry S. Olcott, Alfred Percy Sinnett, and others.
Mato Grosso (– lit. "Thick Bushes") is one of the states of Brazil, the third-largest by area, located in the western part of the country.
Mauritania (موريتانيا; Gànnaar; Soninke: Murutaane; Pulaar: Moritani; Mauritanie), officially the Islamic Republic of Mauritania, is a country in the Maghreb region of Northwestern Africa.
The Māori are the indigenous Polynesian people of New Zealand.
Mercury is the smallest and innermost planet in the Solar System.
Mesori (Ⲙⲉⲥⲱⲣⲓ, Mesōri) is the twelfth month of the Egyptian and Coptic calendars.
In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.
In the history of Europe, the Middle Ages (or Medieval Period) lasted from the 5th to the 15th century.
Middle Persian is the Middle Iranian language or ethnolect of southwestern Iran that during the Sasanian Empire (224–654) became a prestige dialect and so came to be spoken in other regions of the empire as well.
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
is a Japanese multinational automotive manufacturer headquartered in Minato, Tokyo, Japan.
The Mitsubishi Sirius or 4G6/4D6 engine is the name of one of Mitsubishi Motors' four series of inline 4 automobile engines, along with Astron, Orion, and Saturn.
A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellar cloud, the density and size of which permit the formation of molecules, most commonly molecular hydrogen (H2).
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
The Mount Wilson Observatory (MWO) is an astronomical observatory in Los Angeles County, California, United States.
Native Hawaiians (Hawaiian: kānaka ʻōiwi, kānaka maoli, and Hawaiʻi maoli) are the aboriginal Polynesian people of the Hawaiian Islands or their descendants.
The Rev Dr Nevil Maskelyne DD FRS FRSE (6 October 1732 – 9 February 1811) was the fifth British Astronomer Royal.
New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.
New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.
In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.
Abbé Nicolas-Louis de Lacaille, formerly sometimes spelled de la Caille, (15 March 1713 – 21 March 1762) was a French astronomer.
The term night sky, usually associated with astronomy from Earth, refers to the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon.
The Nile River (النيل, Egyptian Arabic en-Nīl, Standard Arabic an-Nīl; ⲫⲓⲁⲣⲱ, P(h)iaro; Ancient Egyptian: Ḥ'pī and Jtrw; Biblical Hebrew:, Ha-Ye'or or, Ha-Shiḥor) is a major north-flowing river in northeastern Africa, and is commonly regarded as the longest river in the world, though some sources cite the Amazon River as the longest.
Noah Brosch (born 1948) is an Israeli astronomer, astrophysicist and space researcher.
The Northern Hemisphere is the half of Earth that is north of the Equator.
Some of the northernmost settlements in the world are.
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.
The Order of the Phoenix is a secret organisation in the Harry Potter series of fiction books written by J. K. Rowling.
Orion is a prominent constellation located on the celestial equator and visible throughout the world.
In Greek mythology, Orion (Ὠρίων or Ὠαρίων; Latin: Orion) was a giant huntsman whom Zeus placed among the stars as the constellation of Orion.
Osiris (from Egyptian wsjr, Coptic) is an Egyptian god, identified as the god of the afterlife, the underworld, and rebirth.
Publius Ovidius Naso (20 March 43 BC – 17/18 AD), known as Ovid in the English-speaking world, was a Roman poet who lived during the reign of Augustus.
The Pacific Ocean is the largest and deepest of Earth's oceanic divisions.
Paris is the capital and most populous city of France, with an area of and a population of 2,206,488.
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
The Pawnee are a Plains Indian tribe who are headquartered in Pawnee, Oklahoma.
Persian, also known by its endonym Farsi (فارسی), is one of the Western Iranian languages within the Indo-Iranian branch of the Indo-European language family.
Persian literature (ادبیات فارسی adabiyāt-e fārsi), comprises oral compositions and written texts in the Persian language and it is one of the world's oldest literatures.
Persian mythology are traditional tales and stories of ancient origin, all involving extraordinary or supernatural beings.
Philosophical Transactions, titled Philosophical Transactions of the Royal Society (often abbreviated as Phil. Trans.) from 1776, is a scientific journal published by the Royal Society.
Hanyu Pinyin Romanization, often abbreviated to pinyin, is the official romanization system for Standard Chinese in mainland China and to some extent in Taiwan.
The Pleiades (also known as the Seven Sisters and Messier 45), are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus.
The high visibility of the star cluster Pleiades in the night sky has guaranteed it a special place in many cultures, both ancient and modern.
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.
Pollux, also designated Beta Geminorum (β Geminorum, abbreviated Beta Gem, β Gem), is an orange-hued evolved giant star approximately 34 light-years from the Sun in the northern constellation of Gemini.
Polynesian culture is the culture of the indigenous peoples of Polynesia who share common traits in language, customs and society.
The Polynesians are a subset of Austronesians native to the islands of Polynesia that speak the Polynesian languages, a branch of the Oceanic subfamily of the Austronesian language family.
Precession is a change in the orientation of the rotational axis of a rotating body.
Procyon, also designated Alpha Canis Minoris (α Canis Minoris, abbreviated Alpha CMi, α CMi), is the brightest star in the constellation of Canis Minor.
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
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.
Pukapuka is a coral atoll in the northern group of the Cook Islands in the Pacific Ocean.
Puppis is a constellation in the southern sky.
The Quran (القرآن, literally meaning "the recitation"; also romanized Qur'an or Koran) is the central religious text of Islam, which Muslims believe to be a revelation from God (Allah).
Rabies is a viral disease that causes inflammation of the brain in humans and other mammals.
The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
Religious texts (also known as scripture, or scriptures, from the Latin scriptura, meaning "writing") are texts which religious traditions consider to be central to their practice or beliefs.
Richard Quintin Twiss (24 August 1920 – 20 May 2005) was a British astronomer.
Rigel, also designated Beta Orionis (β Orionis, abbreviated Beta Ori, β Ori), is generally the seventh-brightest star in the night sky and the brightest star in the constellation of Orion—though periodically it is outshone within the constellation by the variable Betelgeuse.
Robert Hanbury Brown, AC FRS (31 August 1916 – 16 January 2002) was a British astronomer and physicist born in Aruvankadu, India.
Robert Kyle Grenville Temple (born 1945) is an American author best known for his controversial book The Sirius Mystery: New Scientific Evidence of Alien Contact 5,000 Years Ago (first published in 1976 though he began writing it in 1967, with a second edition in 1998 with a new title).
The Robigalia was a festival in ancient Roman religion held April 25, named for the god Robigus.
Romanization or romanisation, in linguistics, is the conversion of writing from a different writing system to the Roman (Latin) script, or a system for doing so.
The romanization of Japanese is the use of Latin script to write the Japanese language.
The Royal Astronomical Society (RAS) is a learned society that began as the Astronomical Society of London in 1820 to support astronomical research (mainly carried on at the time by 'gentleman astronomers' rather than professionals).
The Royal Australian Navy (RAN) is the naval branch of the Australian Defence Force.
The Royal Navy (RN) is the United Kingdom's naval warfare force.
The President, Council and Fellows of the Royal Society of London for Improving Natural Knowledge, commonly known as the Royal Society, is a learned society.
(Sanskrit: रुद्र) is a Rigvedic deity, associated with wind or storm and the hunt.
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales (previously also known as Uredinales).
Rutland is a landlocked county in the East Midlands of England, bounded to the west and north by Leicestershire, to the northeast by Lincolnshire and the southeast by Northamptonshire.
Sabarimala is a Hindu pilgrimage centre located at the Periyar Tiger Reserve in the Western Ghat mountain ranges of Pathanamthitta District, Perunad grama panchayat in Kerala.
In Egyptian mythology, Sah was the "Father of the gods" that was in turn the anthropomorphic representation of a large egyptian constellation that today is represented by the modern myths of Orion and Lepus constellations (but also borrowing stars from modern Eridanus, Monoceros and Columba constellations), and therefore was the egyptian counterpart of the Babylonian "Good Shepherd of Anu" or "Loyal Shepherd of Heaven" (Sumerian: MULSIPA.ZI.AN.NA, Akkadian: šitaddaru).
Saint Petersburg (p) is Russia's second-largest city after Moscow, with 5 million inhabitants in 2012, part of the Saint Petersburg agglomeration with a population of 6.2 million (2015).
Saltigue, sometimes spelt Saltigué or wrongly Saltigui, are Serer high priests and priestesses who preside over the religious ceremonies and affairs of the Serer people, such as the Xoy ceremony, the biggest event in the Serer religious calendar.
According to the post-1900 publications of Theosophy, Lord Sanat Kumara is an "Advanced Being" at the Ninth level of initiation who is regarded as the 'Lord' or 'Regent' of Earth and of the humanity, and is thought to be the head of the Spiritual Hierarchy of Earth who dwells in Shamballah (also known as 'The City of Enoch').
Sanskrit is the primary liturgical language of Hinduism; a philosophical language of Hinduism, Sikhism, Buddhism and Jainism; and a former literary language and lingua franca for the educated of ancient and medieval India.
Satellite radio is defined by the International Telecommunication Union (ITU)'S ITU Radio Regulations (RR) as a broadcasting-satellite service.
Satis (Sṯt or Sṯı͗t,."Pourer" or "Shooter"), also known by numerous related names, was an Upper Egyptian goddess who, along with Khnum and Anuket, formed part of the Elephantine Triad.
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
Science fiction (often shortened to Sci-Fi or SF) is a genre of speculative fiction, typically dealing with imaginative concepts such as advanced science and technology, spaceflight, time travel, and extraterrestrial life.
Seneca the Younger AD65), fully Lucius Annaeus Seneca and also known simply as Seneca, was a Roman Stoic philosopher, statesman, dramatist, and—in one work—satirist of the Silver Age of Latin literature.
Senegal (Sénégal), officially the Republic of Senegal, is a country in West Africa.
Serer, often broken into differing regional dialects such as Serer-Sine and Serer saloum, is a language of the Senegambian branch of Niger–Congo spoken by 1.2 million people in Senegal and 30,000 in the Gambia.
The Serer people are a West African ethnoreligious group.
The Serer religion, or a ƭat Roog ("the way of the Divine"), is the original religious beliefs, practices, and teachings of the Serer people of Senegal in West Africa.
The Seri are an indigenous group of the Mexican state of Sonora.
The Shahnameh, also transliterated as Shahnama (شاهنامه, "The Book of Kings"), is a long epic poem written by the Persian poet Ferdowsi between c. 977 and 1010 CE and is the national epic of Greater Iran.
Shiva (Sanskrit: शिव, IAST: Śiva, lit. the auspicious one) is one of the principal deities of Hinduism.
The planetary systems of stars other than the Sun and the Solar System are a staple element in much science fiction.
Sirius Satellite Radio was a satellite radio (SDARS) and online radio service operating in North America, owned by Sirius XM Holdings.
The Smithsonian Institution, established on August 10, 1846 "for the increase and diffusion of knowledge," is a group of museums and research centers administered by the Government of the United States.
The Society Islands (Îles de la Société or officially Archipel de la Société; Tōtaiete mā.) includes a group of islands in the South Pacific Ocean.
Solar sails (also called light sails or photon sails) are a proposed method of spacecraft propulsion using radiation pressure exerted by sunlight on large mirrors.
The Solar SystemCapitalization of the name varies.
Sopdet is the ancient Egyptian name of the star Sirius and its personification as an Egyptian goddess.
Sopdu (also rendered Septu or Sopedu) was a god of the sky and of eastern border regions in ancient Egyptian religion.
The Sothic cycle or Canicular period is a period of 1,461 Egyptian civil years of 365 days each or 1,460 Julian years averaging 365¼ days each.
The Southern Hemisphere is the half of Earth that is south of the Equator.
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
Stanley F. "Stan" Lombardo (alias Hae Kwang; born June 19, 1943) is an American Classicist, and former professor of Classics at the University of Kansas.
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Stellar evolution is the process by which a star changes over the course of time.
Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.
Stellar rotation is the angular motion of a star about its axis.
The summer solstice (or estival solstice), also known as midsummer, occurs when one of the Earth's poles has its maximum tilt toward the Sun.
A Surah (also spelled Sura; سورة, plural سور suwar) is the term for a chapter of the Quran.
Syncretism is the combining of different beliefs, while blending practices of various schools of thought.
The Princess is a serio-comic blank verse narrative poem, written by Alfred Tennyson, published in 1847.
The Sirius Mystery is a non-fiction book by Robert K. G. Temple first published by St. Martin's Press in 1976.
Theosophy is an esoteric religious movement established in the United States during the late nineteenth century.
Thomas Barker (1722 – 29 December 1809) was a Rutland squire who kept a detailed weather record at Lyndon Hall from 1736 to 1798.
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.
Thomas Jefferson Jackson (T. J. J.) See (February 19, 1866 – July 4, 1962) was an American astronomer whose promulgated theories in astronomy and physics were eventually disproven.
Sir Thomas Maclear (17 March 1794 – 14 July 1879) was an Irish-born South African astronomer who became Her Majesty's astronomer at the Cape of Good Hope.
Tishtrya (Tištrya) or Roozahang is the Avestan language name of a Zoroastrian benevolent divinity associated with life-bringing rainfall and fertility.
The Tohono O’odham are a Native American people of the Sonoran Desert, residing primarily in the U.S. state of Arizona and the Mexican state of Sonora.
A tropical year (also known as a solar year) is the time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice.
Troy (Τροία, Troia or Τροίας, Troias and Ἴλιον, Ilion or Ἴλιος, Ilios; Troia and Ilium;Trōia is the typical Latin name for the city. Ilium is a more poetic term: Hittite: Wilusha or Truwisha; Truva or Troya) was a city in the far northwest of the region known in late Classical antiquity as Asia Minor, now known as Anatolia in modern Turkey, near (just south of) the southwest mouth of the Dardanelles strait and northwest of Mount Ida.
The Tuamotus, also referred to in English as the Tuamotu Archipelago or the Tuamotu Islands (Îles Tuamotu, officially Archipel des Tuamotu), are a French Polynesian chain of almost 80 islands and atolls forming the largest chain of atolls in the world.
Twinkling, or scintillation, is a generic term for variations in apparent brightness or position of a distant luminous object viewed through a medium.
Uppsala (older spelling Upsala) is the capital of Uppsala County and the fourth largest city of Sweden, after Stockholm, Gothenburg and Malmö.
Uranus is the seventh planet from the Sun.
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
The Ursa Major Moving Group, also known as Collinder 285 and the Ursa Major association, is a nearby stellar moving group – a set of stars with common velocities in space and thought to have a common origin in space and time.
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.
Venus is the second planet from the Sun, orbiting it every 224.7 Earth days.
In geometry, a vertex (plural: vertices or vertexes) is a point where two or more curves, lines, or edges meet.
The VLT Survey Telescope (VST) is the latest telescope to be added to ESO’s Paranal Observatory in the Atacama Desert of northern Chile.
Voyager 2 is a space probe launched by NASA on August 20, 1977, to study the outer planets.
Walter Sydney Adams (December 20, 1876 – May 11, 1956) was an American astronomer.
The Well mansion (井宿, pinyin: Jǐng Xiù; Japanese: chichiri-boshi) is one of the Twenty-eight mansions of the Chinese constellations.
Wergaia or Werrigia is an indigenous Australian language group in the Wimmera region of north-Western Victoria.
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
Sir William Huggins (7 February 1824 – 12 May 1910) was an English astronomer best known for his pioneering work in astronomical spectroscopy together with his wife Margaret Lindsay Huggins.
The winter solstice (or hibernal solstice), also known as midwinter, is an astronomical phenomenon marking the day with the shortest period of daylight and the longest night of the year.
The Winter Triangle is an astronomical asterism formed from three of the brightest stars in the winter sky.
The Works and Days (Ἔργα καὶ Ἡμέραι, Erga kai Hēmerai)The Works and Days is sometimes called by the Latin translation of the title, Opera et Dies.
Yazata is the Avestan language word for a Zoroastrian concept with a wide range of meanings but generally signifying (or used as an epithet of) a divinity.
Zeus (Ζεύς, Zeús) is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus.
Zoroastrianism, or more natively Mazdayasna, is one of the world's oldest extant religions, which is monotheistic in having a single creator god, has dualistic cosmology in its concept of good and evil, and has an eschatology which predicts the ultimate destruction of evil.
2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.
2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.
'A, 9 CMa, 9 Canis Majoris, Alhabor, Alpha CMa, Alpha Canis Maioris, Alpha Canis Majoris, Aschere, Canicula, Dog stars, Gliese 244, Gliese 244 A, Gliese 244 B, HD 48915, HIP 32349, SAO 151881, Sirius (star), Sirius A, Sirius AB, Sirius B, Sirius-B, Sirius.B, Sothis, Swart star, The Dog-Star, WD 0642-166, WD 0642–166, Α CMa, Α CMa B, Α Canis Majoris, Α Canis Majoris A, Α Canis Majoris B, Σείριος, الشعرى.