Question

what would have been the colour of the sky if the earth had no atmosphere.​

Answer 1

Answer:

the sky would be dark if there is no atmosphere on earth

Answer 2

Explanation:

Without an atmosphere the sky appears black, as evidenced by the lunar sky in pictures taken from the moon. But even a black sky has some lightness. At night, the sky always has a faint color, called "skyglow" by astronomers.