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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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