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Gliese 15 Ab

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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". [1]

22 relations: Andrew Howard, Andromeda (constellation), Astronomical unit, Calar Alto Observatory, Circumstellar habitable zone, Constellation, Day, Declination, Degree (angle), Earth mass, Exoplanet, Geoffrey Marcy, Gregory W. Henry, Groombridge 34, Light-year, Orbit, Orbital eccentricity, Radial velocity, Right ascension, Super-Earth, Tabetha S. Boyajian, W. M. Keck Observatory.

Andrew Howard

Andrew Howard (born 12 June 1969) is a Welsh theatre, television and film actor.

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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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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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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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Circumstellar habitable zone

In astronomy and astrobiology, the circumstellar habitable zone (CHZ), or simply the habitable zone, is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.

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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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Day

A day, a unit of time, is approximately the period of time during which the Earth completes one rotation with respect to the Sun (solar day).

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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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Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.

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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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Geoffrey Marcy

Geoffrey William Marcy (born September 29, 1954) is an American astronomer.

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Gregory W. Henry

Gregory W. Henry is an astronomer and research scientist for Tennessee State University.

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Groombridge 34

Groombridge 34 is a binary star system in the northern constellation of Andromeda.

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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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Orbit

In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.

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Orbital eccentricity

The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle.

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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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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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Super-Earth

A super-Earth is an extrasolar planet with a mass higher than Earth's, but substantially below the masses of the Solar System's ice giants, Uranus and Neptune, which have masses of 15 and 17 times Earth's, respectively.

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Tabetha S. Boyajian

Tabetha Suzanne Boyajian (born 1980) is an American astronomer and astrophysicist on faculty at Louisiana State University.

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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:

Gl 15 Ab, Groombridge 34 Ab.

References

[1] https://en.wikipedia.org/wiki/Gliese_15_Ab

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