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30 relations: Billion years, Centre de données astronomiques de Strasbourg, Cerro Tololo Inter-American Observatory, Earth radius, Epoch (astronomy), G 240-72, G 99-47, Gliese Catalogue of Nearby Stars, Gravity of Earth, Kelvin, List of star systems within 25–30 light-years, LP 145-141, LP 658-2, Parallax, Procyon, Sirius, Solar mass, Star catalogue, Stein 2051, Sun, Surface gravity, The Astronomical Journal, Van Maanen 2, Volans, WD 2359-434, White dwarf, Willem Jacob Luyten, Wolf 489, 2MASS, 40 Eridani.
Billion years
A billion years (109 years) is a unit of time on the petasecond scale, more precisely equal to seconds.
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Centre de données astronomiques de Strasbourg
The Centre de Données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.
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Cerro Tololo Inter-American Observatory
The Cerro Tololo Inter-American Observatory (CTIO) is an astronomical observatory located on Cerro Tololo in the Coquimbo Region of northern Chile, with additional facilities located on Cerro Pachón about to the southeast.
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Earth radius
Earth radius is the approximate distance from Earth's center to its surface, about.
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Epoch (astronomy)
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.
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G 240-72
G 240-72 (or WD 1748+708, or LHS 455, or GJ 1221) is a nearby degenerate star (white dwarf) of spectral class DQP9.0, located in constellation Draco.
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G 99-47
G 99-47 (V1201 Orionis) is a nearby degenerate star (white dwarf) of spectral class DAP8 (DAP8.9, or DAP8.7), the single known component of the system, located in the constellation Orion.
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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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Gravity of Earth
The gravity of Earth, which is denoted by, refers to the acceleration that is imparted to objects due to the distribution of mass within Earth.
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Kelvin
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.
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List of star systems within 25–30 light-years
This is a list of star systems within 25-30 light years of Earth.
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LP 145-141
LP 145-141 is a white dwarf located 15 light years from the Solar System.
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LP 658-2
LP 658-2 is a degenerate (white dwarf) star in the constellation of Orion, the single known object in its system.
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Parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
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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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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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Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
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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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Stein 2051
Stein 2051 (Gliese 169.1, G 175-034, LHS 26/27) is a nearby binary star system, containing a red dwarf (component A) and a degenerate star (white dwarf) (component B), located in constellation Camelopardalis at about 18 ly from Earth.
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Sun
The Sun is the star at the center of the Solar System.
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Surface gravity
The surface gravity, g, of an astronomical or other object is the gravitational acceleration experienced at its surface.
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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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Van Maanen 2
Van Maanen 2 (van Maanen's Star) is a white dwarf.
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Volans
Volans is a constellation in the southern sky.
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WD 2359-434
WD 2359-434 (Gliese 915, LHS 1005, L 362-81) is a nearby degenerate star (white dwarf) of spectral class DAP5.8, the single known component of the system, located in the constellation Phoenix, the nearest star in this constellation.
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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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Willem Jacob Luyten
Willem Jacob Luyten (March 7, 1899 – November 21, 1994) was a Dutch-American astronomer.
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Wolf 489
Wolf 489 (WD 1334+039, LHS 46, G 062-053, Gliese 518) is a nearby degenerate star (white dwarf) of spectral class DZ10.0), the single known component of the system, located in the constellation Virgo.
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2MASS
The Two Micron All-Sky Survey, or 2MASS, was an astronomical survey of the whole sky in the infrared spectrum and one of the most ambitious such projects.
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40 Eridani
40 Eridani (abbreviated 40 Eri), also designated Omicron² Eridani (ο² Eridani, abbreviated Omicron² Eri, ο² Eri), is a triple star system in the constellation of Eridanus.
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References
[1] https://en.wikipedia.org/wiki/L_97-12
