Why is the sky black at night?

Answer 1

idk because it is what it is

Answer 2

It all has to do with why the sky is blue in the day. Black is the default color - the color your brain interprets when your eye detects no light coming from a particular place in your field of vision. At night, light only comes from the stars and of course, the moon and planets of our own solar system. Since the light sources are so far away, and the intensity of the light is so low, you don't see the blue you see in the day. Instead, your eye actually gets to see the big empty spaces between the sources of light.

You see, the sky is only blue during the day because the sun puts out so much light that the little bit of scattering that occurs becomes obvious. As light travels through the atmosphere, there is a chance it will hit a dust mote, droplet of water, or even a molecule and cause it to change direction. The higher the frequency (towards the purple end of the rainbow) the more likely the light is to hit something because it actually moves in less of a straight line than the lower frequency (red end of the rainbow) light but that gets complicated. Anyway, once the light is deflected, it may get deflected again, and again. Eventually, that light may get deflected down to your eye. But your eye sees the light coming from the point it was last deflected from - not from it's original source (the sun).

The thickness of our atmosphere, the particles floating in it, and its composition, cause the blue light to be the most dominantly deflected light. It comes from all over the sky hiding the stars (and the black emptiness between them) because of the random placement each blue ray that reaches your eye had before reaching you. Who knows how many times it bounced.

Answer 3

The Earth rotates on a continued axis and presents or removes us from the light reflecting from the Sun. It is a natural process that is important to specific regions of the World. Some areas like our poles have continuous sunlight and darkness. The Earth is a big round ball going around behind a few other planets and moons, around the SUN. The black is the galaxy which is why we see stars if we are out far enough from a lit area vs city dwellings that deflect the light from our solar system visibility wise anyway.
* no expert just sci fi buff

Answer 4

One thing other answerers haven't mentioned is the conundrum of why we don't see stars and galaxies in every little bit of the sky since the universe is infinite, or why the sky isn't awash with light from every direction. Well, there is light from every direction, but it's in wavelengths we can't see, especially microwaves. If you could see microwaves, then the sky wouldn't look black at night.
Also, there are galaxies in every direction, but they are so far that their light is too faint for us to see. A good, light-gathering telescope like the Hubble sees them much better, and you can see photos of this "Deep Field" on the Hubble's public web page.

Answer 5

The real question is, why is the sky blue during the day?

Black is the absence of light. At night, with no direct light from the sun, we see the infinite void of space. Since no light comes from empty space, what we see is mostly darkness.

During the day, sunlight is scattered and absorbed by the atmosphere, leaving only blue light to make down to our eyes.

Answer 6

Take a look out there - its all black. We just happen to be lucky enough to be close to a star that provides light on our rotating planet. Spinning around at about 900 mph, we enter, then leave the fixed beam of light about every 12 hours or so.

Answer 7

This is because your prespective on earth is in the side not facing the sun.

It is the sun that illuminates the atmosphere during the day that makes it blue. Take the light away, and it's black.

Answer 8

there is no direct sunlight is there no way you can refract light off the air molecules because the sun is on the otherside of the world which is why
the sky is blue in the day

Answer 9

Because the sun is on the opposite side of the planet.

Answer 10

Because, the sun is shining on the other side of the Earth.

Answer 11

first tell yourself why the sky remains visible at the day light?