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Why Is It Dark At Night?

Have you ever wondered why you look up and see a dark sky at night?

submitted by: fancylad
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Why Is It Dark At Night?. Have you ever wondered why you look up and see a dark sky at night?
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Hits: 7376 | Favorites: 3 | Emailed: 0 | Rating: 2.8 | Category: Science | Date: 10/01/2012
 
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adamslily
Female, 13-17, Southern US
 29 Posts
Thursday, October 4, 2012 12:58:11 AM
beautiful.

Vimto
Male, 40-49, Europe
 2593 Posts
Wednesday, October 3, 2012 12:45:18 AM
Nothing I didn't know, but very nicely explained for those that didn`t.

OldOllie
Male, 60-69, Midwest US
 14431 Posts
Tuesday, October 2, 2012 11:32:52 AM
I like the way their model puts the earth at the center of the universe. Copernicus would be so proud of how far we have come.

Actually, the earth IS the center of the OBSERVABLE Universe, which is the only meaningful way to reference the Universe. More precisely, YOU are always at the center of the observable Universe from your point of view. No matter where you go in space, you will always see yourself as being at the center of the observable Universe. The limit of transparency, i.e., the source of the ~2.7-deg. background radiation, will always appear to be the same distance, ~14 bil LY, from you in any direction, and it's moving away from you at about ~0.99998 c as the Universe expands.

An-egg
Male, 30-39, Eastern US
 866 Posts
Tuesday, October 2, 2012 10:48:28 AM
I like the way their model puts the earth at the center of the universe. Copernicus would be so proud of how far we have come.

Nickel2
Male, 50-59, Europe
 4624 Posts
Tuesday, October 2, 2012 9:48:05 AM
Mmm, fascinating Captain.

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