Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Is what you see what you get?

  1. Dec 22, 2009 #1
    Are the images and data we collect of galaxies and other bodies millions of light years away millions of years old by the time we even take them? For example human sight takes about 50 milliseconds to occur. So there has to be a massive time/image gap between such great distances right?
  2. jcsd
  3. Dec 22, 2009 #2


    User Avatar
    Science Advisor
    Gold Member


    An image of a galaxy 10 million light years away is showing it as it was ten million years ago.

    BTW, welcome to these Forums Eden!

  4. Dec 22, 2009 #3
    Thank you for both an answer and the welcome.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook