why does the sky look dark in night?

Answer 1

Daylight is caused by light from the sun interacting with Earth's atmosphere. At night there is no sunlight therefore no daylight.

Answer 2

Your question looks like an obvious one, but it's actually a very interesting question.
The easy answer is that the sun is on the other side of the Earth, and the sunlight streaming past the Earth keeps going. (Of course, the light that hits the moon bounces back, so we get some light.)
But your question was a famous, very tricky question. Many astronomers a hundred years ago thought the universe was infinite. If that were true, then any line heading out from the earth would eventually hit a star. So the night sky should have no black at all--it should be plastered with stars.
One way to get around this was to say that the most distant stars would be so faint that we wouldn't see them. But, it turns out, that doesn't work either. The argument comes from calculus, but goes something like this. If you looked outward through a hole in the bottom of an ice cream cone, the farther you go, the more area you are covering. Intensity of starlight falls off with the square of the distance, but the number of stars included in the view goes UP with the square of the distance (because area is square measure). These factors cancel out, destroying that "too distant to see" argument.

Now, here's the most interesting part to your question. The sky is NOT dark at night. In fact, it is very bright because radiation comes at us from all directions...the famous 3 degree radiation from the big bang. Your eyes don't register that wavelength, so the sky looks dark to you. But it's not dark to radio telescopes, nor to X-ray and gamma ray telescopes either.
Great question!

Answer 3

Darkness is just the absence of light. Space is dark all the time but, in the daytime, the earth's atmosphere scatters light from the Sun (due to refraction) to make the sky appear blue and 'light'.

Answer 4

Beause if you mix all the colours together you make black , this is what happens in space there are so many colours it appears to be black. So when you look at the sky at night the sky appears to be black, its not just simply the earth turning away from the sun.

Answer 5

When there is light the distance will look like Blue, sky, Sea ,Mountains.When there is no light the distance will be dark, I think.

Answer 6

Why does a room look dark at night.

Answer 7

Because it is clear colorless, or more precisely the atmosphere is colorless.



A better question is:
"Why is the sky opaque blue during the day?"

Answer: refraction


Advice: take remedial science

Answer 8

the blue color during the day is caused by the sun's light as it passes through the atmosphere. at night there is no light so it's dark.

Answer 9

because we see the umbra of earth at nights

Answer 10

, ,Because there is no sunlight.