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96 relations: A-type main-sequence star, Accretion disk, Alpha Trianguli, Andromeda (constellation), Andromeda Galaxy, Apparent magnitude, Arabic, Aries (constellation), Astronomical unit, Astronomy & Astrophysics, Babylonian star catalogues, Bayer designation, Beta Andromedae, Beta Trianguli, Binary star, Brown dwarf, Cataclysmic variable star, Center of mass, Ceres (mythology), Constellation, Constellation family, Dark matter, Debris disk, Declination, Delta Trianguli, Doppler imaging, Enlil, Equatorial coordinate system, Eratosthenes, Eugène Joseph Delporte, Exoplanet, F-type main-sequence star, Flamsteed designation, G-type main-sequence star, Gaius Julius Hyginus, Galaxy filament, Gamma Andromedae, Gamma Trianguli, Giant star, Giovanni Battista Hodierna, H II region, Hamal, HD 13189, HD 9446, Heliacal rising, International Astronomical Union, Iota Trianguli, Johann Bayer, Johannes Hevelius, John Flamsteed, ..., Jupiter, Jupiter (mythology), K-type main-sequence star, Latin, Light pollution, Light-year, Local Group, Mesopotamia, Milky Way, Minute and second of arc, Mira variable, Monthly Notices of the Royal Astronomical Society, MUL.APIN, NGC 604, NGC 672, NGC 784, NGC 925, Nile Delta, North Pole, Parsec, Perseus (constellation), Pisces (constellation), Popular Astronomy (US magazine), Ptolemy, Quasar, Red giant, Right ascension, Sicily, SIMBAD, Spiral galaxy, Star Names, Star system, Starspot, Subgiant, Summer solstice, Teen Ta Tseang Keun, Triangle, Triangulum Australe, Triangulum Galaxy, Triangulum Minus, WASP-56, White dwarf, XX Trianguli, 3C 273, 3C 48, 60th parallel south. Expand index (46 more) »
A-type main-sequence star
An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V. These stars have spectra which are defined by strong hydrogen Balmer absorption lines.
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Accretion disk
An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body.
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Alpha Trianguli
Alpha Trianguli (α Trianguli, abbreviated Alpha Tri, α Tri), also named Mothallah, is a binary star in the constellation of Triangulum.
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Andromeda (constellation)
Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations.
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Andromeda Galaxy
The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way.
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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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Aries (constellation)
Aries is one of the constellations of the zodiac.
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Astronomical unit
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
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Astronomy & Astrophysics
Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
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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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Beta Andromedae
Beta Andromedae (β Andromedae, abbreviated Beta And, β And), also named Mirach, is a prominent star in the northern constellation of Andromeda.
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Beta Trianguli
Beta Trianguli (Beta Tri, β Trianguli, β Tri) is the Bayer designation for a binary star system in the constellation Triangulum, located about 127 light years from Earth.
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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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Brown dwarf
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.
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Cataclysmic variable star
Cataclysmic variable stars (CV) are stars which irregularly increase in brightness by a large factor, then drop back down to a quiescent state.
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Center of mass
In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero, or the point where if a force is applied it moves in the direction of the force without rotating.
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Ceres (mythology)
In ancient Roman religion, Ceres (Cerēs) was a goddess of agriculture, grain crops, fertility and motherly relationships.
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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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Constellation family
Constellation families are collections of constellations sharing some defining characteristic, such as proximity on the celestial sphere, common historical origin, or common mythological theme.
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Dark matter
Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.
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Debris disk
A debris disk is a circumstellar disk of dust and debris in orbit around a star.
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Declination
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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Delta Trianguli
Delta Trianguli (Delta Tri, δ Trianguli, δ Tri) is a spectroscopic binary star system approximately away in the constellation of Triangulum.
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Doppler imaging
Inhomogeneous structures on stellar surfaces, i.e. temperature differences, chemical composition or magnetic fields, create characteristic distortions in the spectral lines due to the Doppler effect.
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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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Equatorial coordinate system
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
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Eratosthenes
Eratosthenes of Cyrene (Ἐρατοσθένης ὁ Κυρηναῖος,; –) was a Greek mathematician, geographer, poet, astronomer, and music theorist.
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Eugène Joseph Delporte
Eugène Joseph Delporte (10 January 1882 – 19 October 1955) was a Belgian astronomer born in Genappe.
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Exoplanet
An exoplanet or extrasolar planet is a planet outside our solar system.
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F-type main-sequence star
An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K.Tables VII and VIII.
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Flamsteed designation
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.
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G-type main-sequence star
A G-type main-sequence star (Spectral type: G-V), often (and imprecisely) called a yellow dwarf, or G dwarf star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.84 to 1.15 solar masses and surface temperature of between 5,300 and 6,000 K., G. M. H. J. Habets and J. R. W. Heintze, Astronomy and Astrophysics Supplement 46 (November 1981), pp.
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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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Galaxy filament
The distribution reveals fine, filamentary structures.
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Gamma Andromedae
Gamma Andromedae (γ Andromedae, abbreviated Gam And, γ And) is the third-brightest point of light in the constellation of Andromeda.
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Gamma Trianguli
Gamma Trianguli (Gamma Tri, γ Trianguli, γ Tri) is a star in the constellation Triangulum located approximately 112 light years from Earth.
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Giant star
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
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Giovanni Battista Hodierna
Giovanni Battista Hodierna, also spelled as Odierna (April 13, 1597 – April 6, 1660) was an Italian astronomer at the court of Giulio Tomasi, Duke of Palma (Palma di Montechiaro).
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H II region
An H II region or HII region is a region of interstellar atomic hydrogen that is ionized.
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Hamal
Hamal, alternatively designated Alpha Arietis (α Arietis, abbreviated Alpha Ari, α Ari), is the brightest star in the northern zodiacal constellation of Aries.
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HD 13189
HD 13189 is an 8th magnitude star in Triangulum constellation.
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HD 9446
HD 9446 is a star located about 172.8 light-years away in the constellation of Triangulum.
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Heliacal rising
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.
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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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Iota Trianguli
Iota Trianguli, Latinized from ι Trianguli, is quadruple star system in constellation of Triangulum.
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Johann Bayer
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
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Johannes Hevelius
Johannes Hevelius Some sources refer to Hevelius as Polish.
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John Flamsteed
John Flamsteed FRS (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal.
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Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
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Jupiter (mythology)
Jupiter (from Iūpiter or Iuppiter, *djous “day, sky” + *patēr “father," thus "heavenly father"), also known as Jove gen.
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K-type main-sequence star
A K-type main-sequence star (K V), also referred to as an orange dwarf or K dwarf, is a main-sequence (hydrogen-burning) star of spectral type K and luminosity class V. These stars are intermediate in size between red M-type main-sequence stars ("red dwarfs") and yellow G-type main-sequence stars.
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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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Light pollution
Light pollution, also known as photopollution, is the presence of anthropogenic light in the night environment.
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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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Local Group
The Local Group is the galaxy group that includes the Milky Way.
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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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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Minute and second of arc
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
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Mira variable
Mira variables ("Mira", Latin, adj. - feminine form of adjective "wonderful"), named for the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.
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Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
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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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NGC 604
NGC 604 is an H II region inside the Triangulum Galaxy.
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NGC 672
NGC 672 is a galaxy in the Triangulum constellation.
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NGC 784
NGC 784 is a barred spiral galaxy about 16.0 Mly away in the constellation Triangulum.
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NGC 925
NGC 925 is a barred spiral galaxy located about 30 million light-years away in the constellation Triangulum.
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Nile Delta
The Nile Delta (دلتا النيل or simply الدلتا) is the delta formed in Northern Egypt (Lower Egypt) where the Nile River spreads out and drains into the Mediterranean Sea.
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North Pole
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
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Parsec
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
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Perseus (constellation)
Perseus is a constellation in the northern sky, being named after the Greek mythological hero Perseus.
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Pisces (constellation)
Pisces is a constellation of the zodiac.
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Popular Astronomy (US magazine)
Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.
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Ptolemy
Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.
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Quasar
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
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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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Right ascension
Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.
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Sicily
Sicily (Sicilia; Sicìlia) is the largest island in the Mediterranean Sea.
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SIMBAD
SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.
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Spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, form part of the Hubble sequence.
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Star Names
Star Names: Their Lore and Meaning is an 1899 book by Richard Hinckley Allen that discusses the names of stars, constellations, and their histories.
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Star system
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.
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Starspot
Starspots are stellar phenomena.
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Subgiant
A subgiant is a star that is brighter than a normal main-sequence star of the same spectral class, but not as bright as true giant stars.
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Summer solstice
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.
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Teen Ta Tseang Keun
Teen Ta Tseang Keun or Tëen ta tsëang keun meaning "Heaven's Great General",Allen (1963): p.37.
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Triangle
A triangle is a polygon with three edges and three vertices.
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Triangulum Australe
Triangulum Australe is a small constellation in the far Southern Celestial Hemisphere.
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Triangulum Galaxy
The Triangulum Galaxy is a spiral galaxy approximately 3 million light-years (ly) from Earth in the constellation Triangulum.
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Triangulum Minus
Triangulum Minus (Latin for the Smaller Triangle) was a constellation created by Johannes Hevelius.
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WASP-56
WASP-56 is a sun-like star of spectral type G6 in the constellation of Coma Berenices.
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White dwarf
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
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XX Trianguli
XX Trianguli is a variable star in the constellation Triangulum.
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3C 273
3C 273 is a quasar located in the constellation Virgo.
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3C 48
3C48 is a quasar discovered in 1960; it was the second source conclusively identified as such.
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60th parallel south
The 60th parallel south is a circle of latitude that is 60 degrees south of the Earth's equatorial plane.
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Redirects here:
Constellation Triangulum, Triangulum (constellation), Triangulum Boreale, Triangulum constellation, Triangulus Septentrionalis.
References
[1] https://en.wikipedia.org/wiki/Triangulum
