Astronomy

A galaxy is receding away from us with a recession velocity of 100,000 km/s. What is the distance to this galaxy? What is the redshift z of this galaxy?

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asked by qwerty
  1. imagine you have obtained spectra from several galaxies and have measured the Red shift of each galaxy to determine the speed away from us. Here are your results:
    Galaxy 1: speed away from us is 10,000 Km/sec.
    Galaxy 2: speed away from us in 1,500 Km/sec.
    Galaxy 3: speed away from us is 30,000 Km/sec.
    extimate the distance to each galaxy from hubble's law. assume that H=23Km/s/Mly

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    posted by karen

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