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28 relations: Andromeda (constellation), Astronomical unit, Barycenter, Calar Alto Observatory, Constellation, Durchmusterung, Earth mass, Exoplanet, Flare star, Gliese 15 Ab, Gliese Catalogue of Nearby Stars, Henry Draper Catalogue, Hipparcos, John Murray (publisher), List of nearest stars and brown dwarfs, Minute and second of arc, Orbital period, Perihelion and aphelion, Radial velocity, Red dwarf, Smithsonian Astrophysical Observatory Star Catalog, Star catalogue, Stefan–Boltzmann constant, Stellar parallax, Stephen Groombridge, Sun, Variable star designation, W. M. Keck Observatory.
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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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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Barycenter
The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.
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Calar Alto Observatory
The Calar Alto Observatory (Centro Astronómico Hispano-Alemán or Deutsch-Spanisches Astronomisches Zentrum, respectively "Spanish–German Astronomical Centre" and "German–Spanish Astronomical Centre") is an astronomical observatory located in Almería province in Spain on Calar Alto, a mountain in the Sierra de Los Filabres range.
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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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Durchmusterung
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.
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Earth mass
Earth mass (where ⊕ is the standard astronomical symbol for planet Earth) is the unit of mass equal to that of Earth.
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Exoplanet
An exoplanet or extrasolar planet is a planet outside our solar system.
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Flare star
A flare star is a variable star that can undergo unpredictable dramatic increases in brightness for a few minutes.
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Gliese 15 Ab
Gliese 15 Ab (GJ 15Ab), also commonly called Groombridge 34 AbActually, in the discovery paper discoverers call this object "Gl 15 Ab", and never "Groombridge 34 Ab".
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Gliese Catalogue of Nearby Stars
The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.
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Henry Draper Catalogue
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.
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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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John Murray (publisher)
John Murray is a British publisher, known for the authors it has published in its history, including Jane Austen, Sir Arthur Conan Doyle, Lord Byron, Charles Lyell, Johann Wolfgang von Goethe, Herman Melville, Edward Whymper, and Charles Darwin.
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List of nearest stars and brown dwarfs
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.
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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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Orbital period
The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
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Perihelion and aphelion
The perihelion of any orbit of a celestial body about the Sun is the point where the body comes nearest to the Sun.
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Radial velocity
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.
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Red dwarf
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
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Smithsonian Astrophysical Observatory Star Catalog
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
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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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Stefan–Boltzmann constant
The Stefan–Boltzmann constant (also Stefan's constant), a physical constant denoted by the Greek letter ''σ'' (sigma), is the constant of proportionality in the Stefan–Boltzmann law: "the total intensity radiated over all wavelengths increases as the temperature increases", of a black body which is proportional to the fourth power of the thermodynamic temperature.
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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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Stephen Groombridge
Stephen Groombridge FRS (7 January 1755 – 30 March 1832) was a British merchant and astronomer.
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Sun
The Sun is the star at the center of the Solar System.
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Variable star designation
Variable stars are designated using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies.
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W. M. Keck Observatory
The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.
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Redirects here:
GJ 15, GJ 15 A, GJ 15 B, GQ Andromedae, GRB 34, GX Andromedae, Gl 15 A, Gl 15 B, Gl 15 Star System, Gliese 15, Groombridge 34 A, Groombridge 34A b, HD 1326, HIP 1475, LTT 10108, SAO 36248.
References
[1] https://en.wikipedia.org/wiki/Groombridge_34
