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Galaxy
Relating to any large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space.
Industry: Astronomy
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Galaxy
angular diameter distance
Astronomy; Galaxy
Distance of a galaxy or any extended astronomical object estimated by comparing its physical size to the angle subtended in the sky.
luminosity function of galaxies
Astronomy; Galaxy
It is defined to be the space density of galaxies with intrinsic luminosities in the range L to L + dL.
anti-electron
Astronomy; Galaxy
Anti-electrons are like an electron but with a positive charge. Its dramatic property would be its pyrotechnic destruction by a conventional negatively charged electron, and the converse possibility ...
galactic globular cluster
Astronomy; Galaxy
Associations of 100,000 to a million stars which have extremely high stellar densities. These clusters are composed of stars that all have the same chemical composition and age. The stars all formed ...
galaxy density
Astronomy; Galaxy
It is defined as the number of galaxies (N=5) within this distance to the the volume of the sphere with the radius of the distance to the 5th nearest galaxy.
global density
Astronomy; Galaxy
Global density is defined as the surface galaxy density in a fixed radius of 2 Mpc around the central galaxy.
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