Question

does the sky is really blue? and does it exist?​

Answer 1

Explanation:

In some cases, such as in discussing the weather, the sky refers to only the lower, more dense portions of the atmosphere. During daylight, the sky appears to be blue because air scatters more blue sunlight than red. At night, the sky appears to be a mostly dark surface or region spangled with stars

Answer 2

yes the sky is blue and exist in nature.

Explanation:

it is blue in colour due to presence of N2 and O2 gasae