How come.......?

Question

How come the moon doesent have a "blue sky" like earth has; and does mars have this so called "blue sky" too?

Answer 1

the sky is not blue. it is percieved as blue because of difraction and light scattering. Look at a picture of earth from space and the only blue is the water, not the sky. Because the moon has no atmosphere it does not look blue.

Answer 2

The blue sky on Earth is due to our atmosphere, which contains nitrogen, oxygen, carbon dioxide and traces of other gas. Sunlight, or white light, is what you get when you mix all different colors of light, and when this mixed light hits our atmosphere from above and like angles, the particular gases in our atmosphere cause the blue light to scatter "unmixing" it and making the color distinctly visible to us. It also causes violet light to do this even more so but the sky doesn't look violet to us because of the way our eyes work.

The moon doesn't have an atmosphere so this can't happen.

Mars does have an atmosphere though. It's thinner than Earth's atmosphere and contains less oxygen and more carbon dioxide. Mars is a very dusty planet and the dust gets kicked up into the atmosphere and affects the color of the sky, giving it various hues of yellowish-brown or reddish or greyish depending on the weather and time of day. However these particles can also make the sky appear bluish at sunset and sunrise on Mars, and if the atmosphere were completely clear of dust, the sky on Mars would appear DEEP BLUE due to a processes similar to the scattering process on Earth.

Answer 3

The Moon has effectively no atmosphere. When you look up from the surface of the Moon, there is nothing between you and deep space, so that's what you see.

Mars has a reddish atmosphere because of all the red dust blowing around.

Earth's sky appears blue because blue light is scattered much more strongly than red light in air. The blue light ends up going in every direction, while the red light tends to stick to a straight line. Hence we see blue coming from every direction, but red coming only from the direction the Sun is in.

Answer 4

This is because earth as an atmosphere.

Look here for why:
http://www.sciencemadesimple.com/sky_blue.html

The moon does not have an atmosphere thus sunlight no medium to be scattered.

Mars does have an atmosphere, but it's composition is different from ours and may scatter light differently (it's also much thinner than earth's atmosphere), but also keep in mind that mars has tiny particles of it's red soil always in the atmosphere (due to lower gravity and small particulate)

Answer 5

From standing on Earth, the sky (the area above us) is blue because the wavelength of light which we perceive as blue is refracted by the atmosphere towards the ground.

I'm not sure what happens with the other wavelengths of light.

Answer 6

The moon doesn't have a significant atmosphere to scatter light. There are several factors that determine the color of the atmosphere. The main factor being the molecular composition of the atmosphere. See Rayleigh scattering for more info.

Answer 7

The Earth's blue sky results from its ocean reflecting in its atmosphere neither of which are present on the moon.