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How far can your cat see into the universe?

  1. Sep 8, 2009 #1
    http://en.wikipedia.org/wiki/List_of_galaxies#List_of_naked-eye_galaxies". M101 is 27 million light years away.

    I've read that the eye of a cat can collect about 20 times more light than the eye of a human. Then, given the brightness of the dimmest galaxies that have been seen by humans, that seems to imply that http://www.atlasoftheuniverse.com/galax200.html" [Broken] should be visible to a cat.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Sep 8, 2009 #2
    does the fact (presumably) that a cat's eye can collect more light than an eye of a man really mean that a can can see further?
    im not the smartest person and pretty new to this forum, but to me it seems that it only makes the cat see wider.
    plus, i think it also depends alot on the ciliary muscles of the eye of cats.
     
  4. Sep 12, 2009 #3
    yeah good point, more light = better resolution, not magnification. Basic microscope concepts.
     
  5. Sep 12, 2009 #4
    Cat's eyes have a "mirror" behind the retina to reflect light back into the light sensor cells. See
    http://www.agarman.dial.pipex.com/bco/fact4.htm
    Our neighbor's cat maybe could see galaxies, but she didn't see the coyote that got her last night. She wasn't the smartest cat on the block.
     
    Last edited by a moderator: Apr 24, 2017
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