Why Is the Sky Blue on Earth but Black on the Moon?

The sky is blue because Earth has air, and the air scatters light from the sun. When we look up, all that scattered blue light makes the sky seem blue. But on the moon, there's no air, so there’s no scattering, only blackness. It's like looking at a night sky with no stars or lights around you.

Take the quiz →

Examples

  1. Imagine you're sitting under a blue blanket on Earth; that’s your sky. On the moon, it's like being in a dark room with only one light bulb shining at you.

Ask a question

See also

Discussion

Recent activity