1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Radio Telescope Resolution - Centaurus A

  1. Nov 22, 2008 #1
    Centaurus A is 15 million light years away and a radio telescope can resolve structures of 1s of arc across. Show that the Structure is 75 light years across.
    Please Help!
  2. jcsd
  3. Nov 22, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    1 sec of arc is 1 / 60 * 1/60 of a degree.
    Imagine a circle 15M light years in radius with you at the centre, what length of the circumference would 1arcsec measure?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Radio Telescope Resolution - Centaurus A
  1. Telescope Resolution (Replies: 3)