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163 relations: A Treatise on the Astrolabe, Absolute magnitude, Aldebaran, Alpha Centauri, Alpha process, Ancient Greek, Ancient Rome, Antares, Apparent magnitude, Arabic, Aratus, Arcas, Arcturus moving group, Asterism (astronomy), Asteroseismology, Astrology, Astronomical Society of the Pacific, Astronomical spectroscopy, Astronomical unit, Atomic number, Avalokiteśvara, Babylonian star catalogues, Bayer designation, Behenian fixed star, Betelgeuse, Big Dipper, Binary star, Boötes, Bolometric correction, Callisto (mythology), Cambridge, Massachusetts, Canoe, Canopus, Celestial equator, Century of Progress, Chinese astronomy, Chinese constellations, Color index, Constellation, Cor Caroli, Corona, Culmination, De Astronomica, Denebola, Dredge-up, Earth, Effective temperature, Eleocharis, Enlil, Eponym, ..., Equator, Eta Boötis, Formica, Frequency separation, Frigatebird, Gaius Julius Hyginus, Gauss (unit), Geoffrey Chaucer, Great Diamond, Hawaii, Hawaii (island), Hawaiian Islands, Hawaiiloa, Hōkūleʻa, Heinrich Cornelius Agrippa, Helium flash, Hertz, Hesiod, Hindu astrology, Hipparcos, Horizontal branch, Horn (Chinese constellation), Hydrogen, IAU Working Group on Star Names, Icarius (Athenian), Infrared, International Astronomical Union, Inuit astronomy, Inuit languages, J band (infrared), Japan, Jasper, Jean-Baptiste Morin (mathematician), Jupiter, Kabbalah, Kāraṇḍavyūhasūtra, Koori, Latin, Latinisation of names, Latitude, Light-year, List of brightest stars, Luminous efficacy, Maera (hound), Magnitude (astronomy), Margin of error, Marquesas Islands, Massachusetts, Māori people, Mesopotamia, Mi'kmaq, Middle Ages, Milingimbi Island, Moriori, Mount Wilson Observatory, MUL.APIN, Nakshatra, Neck (Chinese constellation), Night sky, Northern celestial hemisphere, Northern Hemisphere, Orion's Belt, Photographic plate, Photosphere, Plantago, Plautus, Pollux (star), Polynesia, Polynesian navigation, Polynesian Voyaging Society, Powers of Ten (film), Procyon, Proper motion, R Doradus, Red giant, Red-giant branch, Regulus, Romanization, Rudens (play), Samadhi, Sanskrit, Sidereal and tropical astrology, Signal-to-noise ratio, Sirius, Society Islands, Solar core, Solar cycle, Spectral atlas, Spectrograph, Spica, Spring Triangle, Star, Star catalogue, Stellar classification, Stellar evolution, Stellar magnetic field, Stellar parallax, Substellar object, Sun, Supernova, Svati, Tahiti, The Astronomical Journal, The Astrophysical Journal, Thick disk, Trade winds, Tuamotus, Ursa Major, Vega, Wayfinding, World's Columbian Exposition, Wotjobaluk people, Zenith. Expand index (113 more) »
A Treatise on the Astrolabe
A Treatise on the Astrolabe is a medieval instruction manual on the astrolabe by Geoffrey Chaucer.
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Absolute magnitude
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
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Aldebaran
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.
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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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Alpha process
The alpha process, also known as the alpha ladder, is one of two classes of nuclear fusion reactions by which stars convert helium into heavier elements, the other being the triple-alpha process.
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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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Ancient Rome
In historiography, ancient Rome is Roman civilization from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD, encompassing the Roman Kingdom, Roman Republic and Roman Empire until the fall of the western empire.
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Antares
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.
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Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
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Arabic
Arabic (العَرَبِيَّة) or (عَرَبِيّ) or) is a Central Semitic language that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world. It is named after the Arabs, a term initially used to describe peoples living from Mesopotamia in the east to the Anti-Lebanon mountains in the west, in northwestern Arabia, and in the Sinai peninsula. Arabic is classified as a macrolanguage comprising 30 modern varieties, including its standard form, Modern Standard Arabic, which is derived from Classical Arabic. As the modern written language, Modern Standard Arabic is widely taught in schools and universities, and is used to varying degrees in workplaces, government, and the media. The two formal varieties are grouped together as Literary Arabic (fuṣḥā), which is the official language of 26 states and the liturgical language of Islam. Modern Standard Arabic largely follows the grammatical standards of Classical Arabic and uses much of the same vocabulary. However, it has discarded some grammatical constructions and vocabulary that no longer have any counterpart in the spoken varieties, and has adopted certain new constructions and vocabulary from the spoken varieties. Much of the new vocabulary is used to denote concepts that have arisen in the post-classical era, especially in modern times. During the Middle Ages, Literary Arabic was a major vehicle of culture in Europe, especially in science, mathematics and philosophy. As a result, many European languages have also borrowed many words from it. Arabic influence, mainly in vocabulary, is seen in European languages, mainly Spanish and to a lesser extent Portuguese, Valencian and Catalan, owing to both the proximity of Christian European and Muslim Arab civilizations and 800 years of Arabic culture and language in the Iberian Peninsula, referred to in Arabic as al-Andalus. Sicilian has about 500 Arabic words as result of Sicily being progressively conquered by Arabs from North Africa, from the mid 9th to mid 10th centuries. Many of these words relate to agriculture and related activities (Hull and Ruffino). Balkan languages, including Greek and Bulgarian, have also acquired a significant number of Arabic words through contact with Ottoman Turkish. Arabic has influenced many languages around the globe throughout its history. Some of the most influenced languages are Persian, Turkish, Spanish, Urdu, Kashmiri, Kurdish, Bosnian, Kazakh, Bengali, Hindi, Malay, Maldivian, Indonesian, Pashto, Punjabi, Tagalog, Sindhi, and Hausa, and some languages in parts of Africa. Conversely, Arabic has borrowed words from other languages, including Greek and Persian in medieval times, and contemporary European languages such as English and French in modern times. Classical Arabic is the liturgical language of 1.8 billion Muslims and Modern Standard Arabic is one of six official languages of the United Nations. All varieties of Arabic combined are spoken by perhaps as many as 422 million speakers (native and non-native) in the Arab world, making it the fifth most spoken language in the world. Arabic is written with the Arabic alphabet, which is an abjad script and is written from right to left, although the spoken varieties are sometimes written in ASCII Latin from left to right with no standardized orthography.
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Aratus
Aratus (Ἄρατος ὁ Σολεύς; ca. 315 BC/310 BC240) was a Greek didactic poet.
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Arcas
In Greek mythology, Arcas (Ἀρκάς) was a hunter who became king of Arcadia.
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Arcturus moving group
In astronomy, the Arcturus moving group or Arcturus stream is a moving group or stellar stream which includes the nearby bright star Arcturus.
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Asterism (astronomy)
In observational astronomy, an asterism is a popular known pattern or group of stars that are recognised in the night sky.
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Asteroseismology
Asteroseismology or astroseismology is the study of oscillations in stars.
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Astrology
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.
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Astronomical Society of the Pacific
The Astronomical Society of the Pacific (ASP) is an American scientific and educational organization, founded in San Francisco on February 7, 1889.
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Astronomical spectroscopy
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.
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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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Atomic number
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom.
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Avalokiteśvara
Avalokiteśvara (अवलोकितेश्वर) is a bodhisattva who embodies the compassion of all Buddhas.
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Babylonian star catalogues
Babylonian astronomy collated earlier observations and divinations into sets of Babylonian star catalogues, during and after the Kassite rule over Babylonia.
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Bayer designation
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.
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Behenian fixed star
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.
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Betelgeuse
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.
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Big Dipper
The Big Dipper (US) or the Plough (UK) is an asterism consisting of seven bright stars of the constellation Ursa Major; six of them are of second magnitude and one, Megrez (δ), of third magnitude.
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Binary star
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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Boötes
Boötes is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere.
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Bolometric correction
In astronomy, the bolometric correction is the correction made to the absolute magnitude of an object in order to convert its visible magnitude to its bolometric magnitude.
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Callisto (mythology)
In Greek mythology, Callisto or Kallisto (Καλλιστώ) was a nymph, or the daughter of King Lycaon; the myth varies in such details.
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Cambridge, Massachusetts
Cambridge is a city in Middlesex County, Massachusetts, and part of the Boston metropolitan area.
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Canoe
A canoe is a lightweight narrow vessel, typically pointed at both ends and open on top, propelled by one or more seated or kneeling paddlers facing the direction of travel using a single-bladed paddle.
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Canopus
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.
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Celestial equator
The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth.
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Century of Progress
A Century of Progress International Exposition was a World's Fair registered under the Bureau International des Expositions (BIE), which was held in Chicago, as The Chicago World's Fair, from 1933 to 1934 to celebrate the city's centennial.
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Chinese astronomy
Astronomy in China has a long history, beginning from the Shang Dynasty (Chinese Bronze Age).
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Chinese constellations
Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese xīng guān).
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Color index
In astronomy, the color index is a simple numerical expression that determines the color of an object, which in the case of a star gives its temperature.
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Constellation
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.
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Cor Caroli
Cor Caroli is the traditional name for the binary star also designated Alpha Canum Venaticorum (α Canum Venaticorum, abbreviated Alpha CVn, α CVn), although the International Astronomical Union now regards the name as only applying to the brightest component.
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Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
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Culmination
In astronomy, the culmination of a planet, star, or constellation is its transit over an observer's meridian.
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De Astronomica
De Astronomica, also known as Poeticon Astronomicon, is a book of stories whose text is attributed to "Hyginus", though the true authorship is disputed.
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Denebola
Denebola, also designated Beta Leonis (β Leonis, abbreviated Beta Leo, β Leo) is the second-brightest star in the zodiac constellation of Leo, although the two components of the γ Leonis double star, which are unresolved to the naked eye, have a combined magnitude brighter than it.
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Dredge-up
A dredge-up is a period in the evolution of a star where a surface convection zone extends down to the layers where material has undergone nuclear fusion.
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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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Effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
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Eleocharis
Eleocharis is a virtually cosmopolitan genus of 250 or more species of flowering plants in the sedge family, Cyperaceae.
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Enlil
Enlil, later known as Elil, was the ancient Mesopotamian god of wind, air, earth, and storms.
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Eponym
An eponym is a person, place, or thing after whom or after which something is named, or believed to be named.
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Equator
An equator of a rotating spheroid (such as a planet) is its zeroth circle of latitude (parallel).
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Eta Boötis
Eta Boötis (η Boötis, abbreviated Eta Boo, η Boo) is a binary star in the constellation of Boötes.
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Formica
Formica is a genus of ants of the family Formicidae, commonly known as wood ants, mound ants, thatching ants, and field ants.
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Frequency separation
Frequency separation is a term used in Helio and Asteroseismology for the spacing in frequency between adjacent modes of oscillation having the same angular degree (l) but different radial order (n).
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Frigatebird
Frigatebirds (also listed as "frigate bird", "frigate-bird", "frigate", frigate-petrel") are a family of seabirds called Fregatidae which are found across all tropical and subtropical oceans.
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Gaius Julius Hyginus
Gaius Julius Hyginus (64 BC – AD 17) was a Latin author, a pupil of the famous Cornelius Alexander Polyhistor, and a freedman of Caesar Augustus.
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Gauss (unit)
The gauss, abbreviated as G or Gs, is the cgs unit of measurement of magnetic flux density (or "magnetic induction") (B).
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Geoffrey Chaucer
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.
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Great Diamond
The Great Diamond is an asterism.
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Hawaii
Hawaii (Hawaii) is the 50th and most recent state to have joined the United States, having received statehood on August 21, 1959.
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Hawaii (island)
Hawaiʻi is the largest island located in the U.S. state of Hawaii.
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Hawaiian Islands
The Hawaiian Islands (Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, numerous smaller islets, and seamounts in the North Pacific Ocean, extending some from the island of Hawaiokinai in the south to northernmost Kure Atoll.
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Hawaiiloa
Hawaiiloa is the settler of the island of Hawai'i based on an ancient Hawaiian legend.
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Hōkūleʻa
Hōkūlea is a performance-accurate waa kaulua, a Polynesian double-hulled voyaging canoe.
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Heinrich Cornelius Agrippa
Heinrich Cornelius Agrippa von Nettesheim (14 September 1486 – 18 February 1535) was a German polymath, physician, legal scholar, soldier, theologian, and occult writer.
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Helium flash
A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars (between 0.8 solar masses and 2.0) during their red giant phase (the Sun is predicted to experience a flash 1.2 billion years after it leaves the main sequence).
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Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
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Hesiod
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.
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Hindu astrology
Jyotisha (or Jyotishyam from Sanskrit, from "light, heavenly body") is the traditional Hindu system of astrology, also known as Hindu astrology, Nepalese Shastra, Indian astrology, and more recently Vedic astrology.
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Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
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Horizontal branch
The horizontal branch (HB) is a stage of stellar evolution that immediately follows the red giant branch in stars whose masses are similar to the Sun's.
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Horn (Chinese constellation)
The Horn mansion (角宿, pinyin: Jiǎo Xiù) is one of the Twenty-eight mansions of the Chinese constellations.
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Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
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IAU Working Group on Star Names
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.
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Icarius (Athenian)
In Greek mythology, Icarius (Ἰκάριος Ikários) was a man from Athens who welcomed the god Dionysus.
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Infrared
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
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International Astronomical Union
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.
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Inuit astronomy
The Inuit have traditional names for many constellations, asterisms and stars.
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Inuit languages
The Inuit languages are a closely related group of indigenous American languages traditionally spoken across the North American Arctic and to some extent in the subarctic in Labrador.
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J band (infrared)
In infrared astronomy, the J band refers to an atmospheric transmission window centred on 1.25 micrometres (in the near-infrared).
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Japan
Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.
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Jasper
Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010.
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Jean-Baptiste Morin (mathematician)
Jean-Baptiste Morin (February 23, 1583 – November 6, 1656), also known by the Latinized name as Morinus, was a French mathematician, astrologer, and astronomer.
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Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
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Kabbalah
Kabbalah (קַבָּלָה, literally "parallel/corresponding," or "received tradition") is an esoteric method, discipline, and school of thought that originated in Judaism.
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Kāraṇḍavyūhasūtra
The Kāraṇḍavyūha Sūtra (Tibetan: za ma tog bkod pa zhes bya ba theg pa chen po'i mdo; Chinese: 佛說大乘莊嚴寶王經, Taishō Tripiṭaka 1050) is a Mantrayāna sūtra which extols the virtues and powers of Avalokiteśvara, and is particularly notable for introducing the mantra Om mani padme hum into the sūtra tradition.
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Koori
The Koori People are Indigenous Australians of New South Wales and Victoria.
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Latin
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
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Latinisation of names
Latinisation or Latinization is the practice of rendering a non-Latin name (or word) in a Latin style.
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Latitude
In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface.
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Light-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.
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List of brightest stars
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.
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Luminous efficacy
Luminous efficacy is a measure of how well a light source produces visible light.
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Maera (hound)
In Greek mythology, Maera was the hound of Erigone, daughter of Icarius of Athens.
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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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Margin of error
The margin of error is a statistic expressing the amount of random sampling error in a survey's results.
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Marquesas Islands
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.
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Massachusetts
Massachusetts, officially known as the Commonwealth of Massachusetts, is the most populous state in the New England region of the northeastern United States.
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Māori people
The Māori are the indigenous Polynesian people of New Zealand.
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Mesopotamia
Mesopotamia is a historical region in West Asia situated within the Tigris–Euphrates river system, in modern days roughly corresponding to most of Iraq, Kuwait, parts of Northern Saudi Arabia, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish–Syrian and Iran–Iraq borders.
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Mi'kmaq
The Mi'kmaq or Mi'gmaq (also Micmac, L'nu, Mi'kmaw or Mi'gmaw) are a First Nations people indigenous to Canada's Atlantic Provinces and the Gaspé Peninsula of Quebec as well as the northeastern region of Maine.
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Middle Ages
In the history of Europe, the Middle Ages (or Medieval Period) lasted from the 5th to the 15th century.
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Milingimbi Island
Milingimbi Island, also Yurruwi, is the largest island of the Crocodile Islands group off the coast of Arnhem Land, Northern Territory, Australia.
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Moriori
Moriori are the indigenous people of the Chatham Islands (Rēkohu in Moriori, Wharekauri in Māori), east of the New Zealand archipelago in the Pacific Ocean.
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Mount Wilson Observatory
The Mount Wilson Observatory (MWO) is an astronomical observatory in Los Angeles County, California, United States.
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MUL.APIN
MUL.APIN is the conventional title given to a Babylonian compendium that deals with many diverse aspects of Babylonian astronomy and astrology.
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Nakshatra
Nakshatra (Sanskrit: नक्षत्र, IAST: Nakṣatra) is the term for lunar mansion in Hindu astrology.
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Neck (Chinese constellation)
The Neck mansion (亢宿, pinyin: Kàng Xiù) is one of the Twenty-eight mansions of the Chinese constellations.
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Night sky
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.
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Northern celestial hemisphere
The Northern Celestial Hemisphere, or the Northern Sky, is the northern half of the celestial sphere; that is, it lies north of the celestial equator.
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Northern Hemisphere
The Northern Hemisphere is the half of Earth that is north of the Equator.
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Orion's Belt
Orion's Belt or the Belt of Orion, also known as the Three Kings or Three Sisters, is an asterism in the constellation Orion.
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Photographic plate
Photographic plates preceded photographic film as a capture medium in photography.
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Photosphere
The photosphere is a star's outer shell from which light is radiated.
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Plantago
Plantago is a genus of about 200 species of small, inconspicuous plants commonly called plantains or fleaworts.
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Plautus
Titus Maccius Plautus (c. 254 – 184 BC), commonly known as Plautus, was a Roman playwright of the Old Latin period.
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Pollux (star)
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.
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Polynesia
Polynesia (from πολύς polys "many" and νῆσος nēsos "island") is a subregion of Oceania, made up of more than 1,000 islands scattered over the central and southern Pacific Ocean.
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Polynesian navigation
Traditional Polynesian navigation was used for thousands of years to make long voyages across thousands of miles of the open Pacific Ocean.
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Polynesian Voyaging Society
The Polynesian Voyaging Society (PVS) is a non-profit research and educational corporation based in Honolulu, Hawaiokinai.
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Powers of Ten (film)
The Powers of Ten films are two short American documentary films written and directed by Charles and Ray Eames.
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Procyon
Procyon, also designated Alpha Canis Minoris (α Canis Minoris, abbreviated Alpha CMi, α CMi), is the brightest star in the constellation of Canis Minor.
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Proper motion
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.
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R Doradus
R Doradus (HD 29712 or P Doradus) is the name of a red giant Mira variable star in the far-southern constellation Dorado, although visually it appears more closely associated with the constellation Reticulum.
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Red giant
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.
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Red-giant branch
The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution.
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Regulus
Regulus, also designated Alpha Leonis (α Leonis, abbreviated Alpha Leo, α Leo), is the brightest star in the constellation of Leo and one of the brightest stars in the night sky, lying approximately 79 light years from the Sun.
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Romanization
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.
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Rudens (play)
Rudens is a play by Roman author Plautus, thought to have been written around 211 BC.
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Samadhi
Samadhi (Sanskrit: समाधि), also called samāpatti, in Hinduism, Buddhism, Jainism, Sikhism and yogic schools refers to a state of meditative consciousness.
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Sanskrit
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.
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Sidereal and tropical astrology
Sidereal and tropical are astrological terms used to describe two different definitions of a year.
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Signal-to-noise ratio
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
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Sirius
Sirius (a romanization of Greek Σείριος, Seirios,."glowing" or "scorching") is a star system and the brightest star in the Earth's night sky.
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Society Islands
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.
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Solar core
The core of the Sun is considered to extend from the center to about 0.2 to 0.25 of solar radius.
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Solar cycle
The solar cycle or solar magnetic activity cycle is the nearly periodic 11-year change in the Sun's activity (including changes in the levels of solar radiation and ejection of solar material) and appearance (changes in the number and size of sunspots, flares, and other manifestations).
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Spectral atlas
In astronomy, a spectral atlas is a collection of spectra of one or more objects, intended as a reference work for comparison with spectra of other objects.
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Spectrograph
A spectrograph is an instrument that separates light into a frequency spectrum and records the signal using a camera.
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Spica
Spica, also designated Alpha Virginis (α Virginis, abbreviated Alpha Vir, α Vir), is the brightest star in the constellation of Virgo and the 16th brightest star in the night sky.
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Spring Triangle
The Spring Triangle is an astronomical asterism involving an imaginary triangle drawn upon the celestial sphere, with its defining vertices at Arcturus, Spica, and Regulus.
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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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Star catalogue
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
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Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
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Stellar evolution
Stellar evolution is the process by which a star changes over the course of time.
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Stellar magnetic field
A stellar magnetic field is a magnetic field generated by the motion of conductive plasma inside a star.
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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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Substellar object
A substellar object, sometimes called a substar, is an astronomical object whose mass is smaller than the smallest mass at which hydrogen fusion can be sustained (approximately 0.08 solar masses).
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Sun
The Sun is the star at the center of the Solar System.
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Supernova
A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.
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Svati
Swati (Devanagari स्वाति, Transliteration IAST svāti, also found svātī́) According to some is a feminine noun of unknown derivation or ′su′ + ′ati′ (″Great goer″, in reference to its remoteness) meaning very beneficent.
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Tahiti
Tahiti (previously also known as Otaheite (obsolete) is the largest island in the Windward group of French Polynesia. The island is located in the archipelago of the Society Islands in the central Southern Pacific Ocean, and is divided into two parts: the bigger, northwestern part, Tahiti Nui, and the smaller, southeastern part, Tahiti Iti. The island was formed from volcanic activity and is high and mountainous with surrounding coral reefs. The population is 189,517 inhabitants (2017 census), making it the most populous island of French Polynesia and accounting for 68.7% of its total population. Tahiti is the economic, cultural and political centre of French Polynesia, an overseas collectivity (sometimes referred to as an overseas country) of France. The capital of French Polynesia, Papeete, is located on the northwest coast of Tahiti. The only international airport in the region, Fa'a'ā International Airport, is on Tahiti near Papeete. Tahiti was originally settled by Polynesians between 300 and 800AD. They represent about 70% of the island's population, with the rest made up of Europeans, Chinese and those of mixed heritage. The island was part of the Kingdom of Tahiti until its annexation by France in 1880, when it was proclaimed a colony of France, and the inhabitants became French citizens. French is the only official language, although the Tahitian language (Reo Tahiti) is widely spoken.
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The Astronomical Journal
The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by IOP Publishing.
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The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
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Thick disk
The thick disk is one of the structural components of about 2/3 of all disk galaxies, including the Milky Way.
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Trade winds
The trade winds are the prevailing pattern of easterly surface winds found in the tropics, within the lower portion of the Earth's atmosphere, in the lower section of the troposphere near the Earth's equator.
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Tuamotus
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.
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Ursa Major
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
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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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Wayfinding
Wayfinding encompasses all of the ways in which people (and animals) orient themselves in physical space and navigate from place to place.
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World's Columbian Exposition
The World's Columbian Exposition (the official shortened name for the World's Fair: Columbian Exposition, also known as the Chicago World's Fair and Chicago Columbian Exposition) was a world's fair held in Chicago in 1893 to celebrate the 400th anniversary of Christopher Columbus's arrival in the New World in 1492.
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Wotjobaluk people
The Wotjobaluk were an indigenous Australian people of the state of Victoria.
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Zenith
The zenith is an imaginary point directly "above" a particular location, on the imaginary celestial sphere.
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Redirects here:
16 Boo, 16 Boötes, 16 Boötis, Abramech, Alpha Boo, Alpha Bootis, Alpha Boötis, Alramech, Arctulus, Arcturis, Arcturos (mythology), Arcturus (star), GJ 541, Gliese 541, HD 124897, HIP 69673, HR 5340, LHS 48, SAO 100944, Α Boo, Α Bootes, Α Bootis.
References
[1] https://en.wikipedia.org/wiki/Arcturus
