Question

why does the sky appear dark instead of blue to an astronaut??​

Answer 1

The sky appears dark instead of blue to an astronaut because there is no atmosphere in the outer space that can scatter the sunlight. As the sunlight is not scattered, no scattered light reach the eyes of the astronauts and the sky appears black to them.

Answer 2

Answer:

Space has no atmosphere. Hence, light rays from the sun are not scattered in the atmosphere. Due to this, the sky appears dark to an astronaut.