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Telescopium Herschilii
Telescopium Herschelii (Latin for ''Herschel's telescope''), also formerly known as Tubus Hershelli Major, is a former constellation in the northern celestial hemisphere. Maximilian Hell established it in 1789 to honour Sir William Herschel's discovery of the planet Uranus. It fell out of use by the end of the 19th century. Psi2 Aurigae at apparent magnitude 4.8 was the constellation's brightest star. History It was one of two constellations created by Maximilian Hell in 1789 to honour the famous English astronomer Sir William Herschel's discovery of the planet Uranus. Named ''Tubus Hershelli Major'' by Hell, it was located in the constellation Auriga near the border to Lynx and Gemini and depicted Herschel's 20-ft-long telescope. Its sibling was Tubus Hershelli Minor, which lay between Orion and Taurus. The two telescopes lay near Zeta Tauri, near where the planet Uranus was first spotted. Johann Elert Bode renamed the constellation ''Telescopium Herschelii'' and omitt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescopium Hherschelii Photograph Labeled
Telescopium is a minor constellation in the southern celestial hemisphere, one of twelve named in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Its name is a Latinized form of the Greek word for telescope. Telescopium was later much reduced in size by Francis Baily and Benjamin Gould. The brightest star in the constellation is Alpha Telescopii, a blue-white subgiant with an apparent magnitude of 3.5, followed by the orange giant star Zeta Telescopii at magnitude 4.1. Eta and PZ Telescopii are two young star systems with debris disks and brown dwarf companions. Telescopium hosts two unusual stars with very little hydrogen that are likely to be the result of two merged white dwarfs: PV Telescopii, also known as HD 168476, is a hot blue extreme helium star, while RS Telescopii is an R Coronae Borealis variable. RR Telescopii is a cataclysmic variable that brightened as a nova to magnitude 6 in 1948. Telescop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeta Tauri
Zeta Tauri (ζ Tauri, abbreviated Zeta Tau, ζ Tau) is a binary star in the zodiac constellation of Taurus, the Bull. It has an apparent visual magnitude of about 3.0, which is bright enough to be seen with the naked eye. Parallax measurements place it at a distance of roughly 440 light-years from the Sun. The two components are designated Zeta Tauri A (officially named Tianguan ) and Zeta Tauri B. Nomenclature ''ζ Tauri'' ( Latinised to ''Zeta Tauri'') is the star's Bayer designation; it also bears the Flamsteed designation of 123 Tauri. The designations of the two components as ''Zeta Tauri A'' and ''B'' derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU). In Chinese astronomy, Zeta Tauri is called 天關, Pinyin: Tiānguān, formerly transliterated ''Tien Kwan'', meaning ''Celestial rontierGate'', an asterism within the Net (畢宿 ''Bì Xiù'') mans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Debris Disk
A debris disk (American English), or debris disc (Commonwealth English), is a circumstellar disk of dust and debris in orbit around a star. Sometimes these disks contain prominent rings, as seen in the image of Fomalhaut on the right. Debris disks are found around stars with mature planetary systems, including at least one debris disk in orbit around an evolved neutron star. Debris disks can also be produced and maintained as the remnants of collisions between planetesimals, otherwise known as asteroids and comets. By 2001, more than 900 candidate stars had been found to possess a debris disk. They are usually discovered by examining the star system in infrared light and looking for an excess of radiation beyond that emitted by the star. This excess is inferred to be radiation from the star that has been absorbed by the dust in the disk, then re-radiated away as infrared energy. Debris disks are often described as massive analogs to the debris in the Solar System. Most known de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omicron Geminorum
Omicron Geminorum (ο Geminorum, abbreviated Omicron Gem, ο Gem), also named Jishui, is a solitary star in the constellation of Gemini. It is faintly visible to the naked eye with an apparent visual magnitude of 4.90. Based upon an annual parallax shift of 19.61 mas, it is located at a distance of 166 light-years from the Sun. Nomenclature ''ο Geminorum'' ( Latinised to ''Omicron Geminorum'') is the star's Bayer designation. The star bore the traditional Chinese name of ''Jishui''. In 2016, the IAU organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN approved the name ''Jishui'' for this star on 30 June 2017 and it is now so included in the List of IAU-approved Star Names. It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU). Properties This is an F-type giant star with a stellar classif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
66 Aurigae
66 Aurigae is a single star located approximately 880 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a faint, orange hued star with an apparent magnitude of 5.23. This object is moving further from the Earth with a heliocentric radial velocity of +22.6 km/s. At the age of 107 million years, 66 Aurigae is an evolved giant star, most likely (98% chance) on the horizontal branch, with a stellar classification of K0.5 IIIa. Keenan and Yorka (1987) identified it as a strong– CN star, showing an excess strength of the blue CN bands in the spectrum. Having exhausted the supply of hydrogen at its core, the star has expanded to 48 times the Sun's radius. 66 Aurigae has five times the mass of the Sun and is radiating 834 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,475 K. It was also known to be part of a much bigger constellation named Telescopium Her ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
65 Aurigae
65 Aurigae is a binary star system located 252 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a faint, orange hued star with an apparent visual magnitude of 5.12. The primary, designated component A, is an aging giant star with a stellar classification of K0 III. It is 3.31 billion years old and has expanded to 13 times the Sun's radius after exhausting the hydrogen at its core. Its companion, component B, is a magnitude 11.7 star located at an angular separation of from the primary, as of 2008. The pair are moving further from the Earth with a heliocentric radial velocity The radial velocity or line-of-sight velocity, also known as radial speed or range rate, of a target with respect to an observer is the temporal rate of change, rate of change of the distance or Slant range, range between the two points. It is e ... of 22 km/s. References External links HR 2793CCDM J07220+3646Image 65 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
64 Aurigae
64 Aurigae is a single star located 312 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, white-hued star with an apparent magnitude of 5.87. The star is moving closer to the Earth with a heliocentric radial velocity of −10, and may come to within in around 5.3 million years. It is a member of the Sirius supercluster. This object is an ordinary A-type main-sequence star with a stellar classification of 5 Vn, where the 'n' notation is used to indicate "nebulous" lines in the spectrum caused by rapid rotation. It is 291 million years old with a projected rotational velocity of 212 km/s. The star has 1.67 times the mass of the Sun and is radiating 27 times the Sun's luminosity from its photosphere at an 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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
63 Aurigae
63 Aurigae is a single star located around 395 light years away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a faint, orange-hued star with an apparent magnitude of 4.91. It is moving closer to the Earth with a heliocentric radial velocity of −28 km/s. This is an evolved giant star with a stellar classification of K4 III. After exhausting the hydrogen at its core, the star has expanded to 37 times the radius of the Sun. It is radiating 335 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,068 K. It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psi7 Aurigae
Psi7 Aurigae, Latinized from ψ7 Aurigae, is a star in the northern constellation of Auriga. It is a dim, naked eye star with an apparent visual magnitude of 5.02. Based upon Gaia Data Release 2 parallax values, it is approximately from Earth. ψ7 Aurigae is a giant star with a stellar classification of K3 III. The measured angular diameter of this star, after correction for limb darkening, is . At its estimated distance, this yields a physical size of about 24 times the radius of the Sun. The outer envelope has an effective temperature of 4,300, giving it an orange colour and a classification as a K-type star. Although cooler than the sun, its larger size means that it is more luminous, emitting in total 217 times as much electromagnetic radiation. See also * Psi Aurigae The Bayer designation Psi Aurigae (ψ Aur, ψ Aurigae) is shared by nine star systems in the constellation Auriga (constellation), Auriga and one in Lynx (constellation), Lynx: * Psi1 Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psi5 Aurigae
__NOTOC__ Psi5 Aurigae (ψ5 Aur, ψ5 Aurigae) is a star in the northern constellation of Auriga. It is faintly visible to the naked eye with an apparent visual magnitude of 5.25. Based upon parallax measurements made during the Hipparcos mission, this star is approximately distant from Earth. There is an optical companion which is 36 arcseconds away and has an apparent magnitude of +8.4. The spectrum of this star shows it to be a G-type main sequence star with a stellar classification of G0 V. Thought to be around 4 billion years old, it is similar in size, mass, and composition to the Sun, making this a solar analog. It is radiating energy into space at an effective temperature of 5,989 K, giving it the golden-hued glow of a G-type star. Observation in the infrared shows an excess emission that suggests the presence of a circumstellar disk of dust, known as a debris disk. This material has a mean temperature of 60 K, indicating that it is orbiting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psi4 Aurigae
__NOTOC__ Psi4 Aurigae, Latinized from ψ4 Aurigae, is a single, orange-hued star in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of +5.02. With an annual parallax shift of , it is approximately distant from Earth. This is a K-type giant star with a stellar classification of K5 III. It has expanded to 33 times the Sun's radius and is radiating 245 times the Sun's luminosity from its photosphere at an effective temperature of about 3,970 K. The atmosphere displays a significant enhancement of silicon. See also * Psi Aurigae The Bayer designation Psi Aurigae (ψ Aur, ψ Aurigae) is shared by nine star systems in the constellation Auriga (constellation), Auriga and one in Lynx (constellation), Lynx: * Psi1 Aurigae, ψ1 Aurigae ＝ 46 Aurigae * Psi2 Aurigae, ψ2 Aurigae ... References External links HR 2459Image Psi4 Aurigae {{DEFAULTSORT:Psi4 Aurigae K-type giants Auriga (constellation) Auri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 (one million million, or billion in long scale). As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). Because it includes the time-measurement word "year", the term ''light-year'' is sometimes misinterpreted as a unit of time. The ''light-year'' is most often used when expressing distances to stars and other distances on a galactic scale, especially in non-specialist contexts and popular science publications. The unit most commonly used in professional astronomy is the parsec (symbol: pc, about 3.26 light-years) which derives from astrometry; it is the distance at which one astronomical unit subtends an angle of one second of arc. Defini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
