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I Andromeda's image

  1. May 20, 2016 #1
    Hi everyone. The next link shows how the Andromeda should look like (from the Earth's surface) if its stars were much more brighter than they are (or if we could have a super-vision).
    http://www.iflscience.com/space/what-andromeda-would-look-night-if-it-were-brighter
    It seems so amazing as I couldn't even imagine how close the Andromeda is to us.
    However, I'd like to verify this info (as I don't know the credibility of this site).
    What's your opinion??? Do you agree with this image???
     
  2. jcsd
  3. May 20, 2016 #2
    It looks reasonable to me, but I don't know if this an 'artists impression', or has somebody processed a real photo with the pixel brightness exaggerated,
    Either way it's art rather than actual science, I like it though, and I wouldn't say it's misleading
     
  4. May 20, 2016 #3

    George Jones

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    This seems reasonable to me. The Moon's actual image is a lot smaller than image that most of us have in our mind's eye. The full moon only subtends about 1/2 of a degree, and Andromeda is a few degrees in image size.

    Are you familiar with the two stars (separated by 5 1/2 degrees) in the Big Dipper that point to the North Star? On moonless nights I sometimes ask friends "How many full moons will fit between those two stars?" A typical response is "about four", which isn't close to the correct answer, "eleven." When we can't see the Moon, we think the Moon is bigger than it actually is.
     
    Last edited: May 20, 2016
  5. May 20, 2016 #4
    If you read the text you'll see that the artist took a typical image of Andromeda and added it to the original photo, but in an appropriate scale (i.e. 3 times wider than the moon is).
     
  6. May 20, 2016 #5
    Yes, I discovered that after my previous post, it seems to be a pretty good idea for a way of doing this image with fair accuracy.
     
  7. May 21, 2016 #6

    davenn

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    a complete artists impression of the galaxy .... it looks nothing like that through a scope
     
  8. May 21, 2016 #7

    russ_watters

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    Yes, it looks nothing like that through a scope with your eyes, but it looks like a photo to me.
     
  9. May 22, 2016 #8
    I think that the artist used this photo:
    http://www.universetoday.com/30289/andromeda-galaxy/
    This photo is just flipped, rotated and scaled. (I can't find how this Andromeda's photo has been produced but it seems to be a combination of different captures through a telescope, as the several "circles of views" depict.)
     
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