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11 relations: Cancer (constellation), Comoving and proper distances, Edward Fomalont, Epoch (astronomy), Giga-, Light-year, Lyon-Meudon Extragalactic Database, Quasar, Sergei Kopeikin, Speed of gravity, Very-long-baseline interferometry.
Cancer (constellation)
Cancer is one of the twelve constellations of the zodiac.
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Comoving and proper distances
In standard cosmology, comoving distance and proper distance are two closely related distance measures used by cosmologists to define distances between objects.
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Edward Fomalont
Edward Fomalont (born May 14, 1940) is an American scientist working at the National Radio Astronomy Observatory.
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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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Giga-
Giga is a unit prefix in the metric system denoting a factor of a (short-form) billion (109 or 000).
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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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Lyon-Meudon Extragalactic Database
The Lyon-Meudon Extragalactic Database (LEDA) was a database of galaxies, created in 1983 at the Lyon Observatory.
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Quasar
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
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Sergei Kopeikin
Sergei Kopeikin (born April 10, 1956) is a USSR-born theoretical physicist presently living and working in the United States, where he holds the position of Professor of Physics at the University of Missouri in Columbia, Missouri.
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Speed of gravity
In classical theories of gravitation, the changes in a gravitational field propagate.
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Very-long-baseline interferometry
Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy.
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