Why Is It Dark At Night?

Submitted by: fancylad 5 years ago in Science

Have you ever wondered why you look up and see a dark sky at night?
There are 19 comments:
Female 29
beautiful.
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Male 2,862
Nothing I didn`t know, but very nicely explained for those that didn`t.
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Male 15,832
[quote]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.[/quote]
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.
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Male 884
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.
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Male 5,872
Mmm, fascinating Captain.
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Male 5,811
Olbers` paradox.
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Male 86
I love how douches are like "Didn`t everybody know this already? Like, duh."

Don`t assume just because you know something that everybody else should know it.

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Male 13,630
Didnt folk know this??
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Male 7,774
My brain hurts
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Male 685
God did it!
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Male 1,104
wow, that was actually very informative.

... and i love that cute little guy standing on planet earth!
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Male 12,138
Sad that this is news to many people.
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Male 12,365
TruTenrMan:

You might like these channels too:

Sixty Symbols

Nottingham Science
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Male 15,832
...and interstellar dust has nothing to do with it. Nope. Not a thing.
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Male 5,314
too complicated. God turns off the sun.
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Male 758
Cool, I love this stuff.
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Male 2,552
One of my favorite YouTube channels:
/user/minutephysics
/user/vihart
/user/AsapSCIENCE
/user/numberphile
/user/spacelab
/user/Vsauce
/user/Vsauce2
/user/WhatYouOughtToKnow
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Male 2,855
huh, this is full of bullhsit
ionization of the universe?
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Male 20,899
Link: Why Is It Dark At Night? [Rate Link] - Have you ever wondered why you look up and see a dark sky at night?
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