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