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Calculate distance between stars in a globular cluster?

  1. Apr 4, 2009 #1
    Would it be possible to calculate the approximate distance between stars in a globular cluster by doing something simple like this:

    Approximate distance to a cluster: 25,000 Ly
    Two stars in the cluster just barely resolved in my telescope (resolution about 1 arcsec)

    Therefore: 2pi (25,000)/60*60*360

    equals approximately 0.12Ly, or about 0.037pc?????

  2. jcsd
  3. Apr 5, 2009 #2


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    Gold Member

    that is pretty much how its done. scientists try to find variable stars wth fairly well known properties [standard candles] and muddle their way from there.
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