32 relations: Andrea M. Ghez, Apparent magnitude, Apsis, Astronomical radio source, Astronomical unit, Astronomy & Astrophysics, Declination, Epoch (astronomy), European Southern Observatory, Galaxy, General relativity, International Celestial Reference System, Jupiter, Kepler orbit, Light-second, Max Planck Institute for Extraterrestrial Physics, Milky Way, Neptune, Neutron star, Parsec, Right ascension, S0–102, Sagittarius (constellation), Sagittarius A*, Semi-major and semi-minor axes, Solar mass, Stellar classification, Sun, Supermassive black hole, The Astrophysical Journal, University of California, Los Angeles, White dwarf.
Andrea Mia Ghez (born June 16, 1965) is an American astronomer and professor in the Department of Physics and Astronomy at UCLA.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
An apsis (ἁψίς; plural apsides, Greek: ἁψῖδες) is an extreme point in the orbit of an object.
Astronomical radio sources are objects in outer space that emit strong radio waves.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
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.
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.
The European Southern Observatory (ESO) is a 15-nation intergovernmental research organization for ground-based astronomy.
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics.
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
In celestial mechanics, a Kepler orbit (or Keplerian orbit) is the motion of one body relative to another, as an ellipse, parabola, or hyperbola, which forms a two-dimensional orbital plane in three-dimensional space.
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics.
The Max Planck Institute for Extraterrestrial Physics is a Max Planck Institute, located in Garching, near Munich, Germany.
The Milky Way is the galaxy that contains our Solar System.
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
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.
S0–102 is a star that is located very close to the centre of the Milky Way, near the radio source Sagittarius A*, orbiting it with an orbital period of 11.5 years.
Sagittarius is one of the constellations of the zodiac.
Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation Sgr A*) is a bright and very compact astronomical radio source at the center of the Milky Way, near the border of the constellations Sagittarius and Scorpius.
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
The Sun is the star at the center of the Solar System.
A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
The University of California, Los Angeles (UCLA) is a public research university in the Westwood district of Los Angeles, United States.
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.