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Asked by anon-181165 on 5 Jun 2018.
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Alex Haragan answered on 5 Jun 2018:
Well I’m not a physicist or space expert – but if I recall correctly then “darkness” is simply the absence of light.
Most of space is empty. Even a fairly dense part of space has millions of miles inbetween close objects.
If you imagine that a space is dark if there is no light (imagine the inside of a box – its empty, with no light, so its dark).
Outer Space is mostly a lot of empty – and even with giant stars everywhere they aren’t even close to enough to light it all up!
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Joey Shepherd answered on 5 Jun 2018:
I think just because of the vast distances between light-emitting stars, most of it is dark
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Daniel Rhodes answered on 6 Jun 2018:
This is a great question! For an area to appear light, light has to be reflected from things and bounced towards your eye, if nothing is scattering the light (like in the vacuum of space) then it won’t reach your eye. That means you have to look directly at the light source to see the light. But there’s trillions of stars, so that doesn’t explain why we don’t constantly see stars in every inch of the sky right? So this is really cool, basically there actually is light from the stars lighting up our entire sky, but it has been stretched out so that our eyes can no longer see it. It’s moved from the visible part of the light spectrum to microwave radiation.
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