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单词 Hubble’s law
释义
Hubble’s law

Physics
  • An empirical law in astronomy stating that the velocity v at which a distant galaxy is receding from the earth is proportional to its distance d from the earth. This law is usually expressed in the form v=Hd, where H is the Hubble constant. Hubble’s law was stated by Edwin Hubble in 1929. It can be derived from models of the expanding universe in general relativity theory.


Geology and Earth Sciences
  • As formulated in 1936 by the American astronomer Edwin Powell Hubble (1889–1953) and his colleague Milton Lasell Humason (1891–1972), the distance to a galaxy in light-years is equal to one-hundredth of its red-shift velocity in miles per second.


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