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HD 10180 planets discovered

  1. Aug 29, 2010 #1

    HD 10180 star system

    http://en.wikipedia.org/wiki/HD_10180" [Broken]
    http://en.wikipedia.org/wiki/55_Cancri" [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 5, 2010 #2
    127 light years away! That's approx thirty-one times farther than our nearest star.
    Two-way communication would take more than two-hundred fifty years. Anyone sending a message would be dead by the time a reply arrived.
  4. Sep 6, 2010 #3

    Active two-way personal human to human (or alien) communication between any two different star systems would be limited to about 40 light years radius and only one message per human lifetime.
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