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Thread: changing point of reference

  1. #1 changing point of reference 
    Forum Sophomore
    Join Date
    Feb 2008
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    as we know our earth moves round the sun. as its orbit is fixed we can calculate the position of other planets and stars. how do we do that?


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  3. #2  
    Forum Professor sunshinewarrior's Avatar
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    Sep 2007
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    Question?

    Or riddle?

    We tend to, for the nearer stars and planets, use parallax observations to give us an idea. But even that is complicated. If you're looking for answers, I recommend Kitty Ferguson's Measuring the Universe - well written and quite comprehensive.


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