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# At what velocity do the galaxies recede from the earth?

Question #108232. Asked by author. (Aug 23 09 6:33 PM)

gmackematix

Judging by the latest estimates, Hubble's constant says that the galaxies are receding at 75 km/s for every Megaparsec of difference between them:
http://en.wikipedia.org/wiki/Hubble%27s_constant

As an example, one of our nearest galaxies, Andromeda is, according to four different methods about 770 kiloparsecs away so 0.77 Megaparsecs.

So that galaxy would be receding at a brisk 58 km/s or about 130,000 mph in old money.

 Aug 23 09, 7:30 PM

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