GENERAL KNOWLEDGE

Detailed explanation-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.

Detailed explanation-2: -But this is only easy to see in pictures taken from space. I can confirm this space fact. The sun appears yellow due to our atmosphere. But once you leave the Earth’s atmosphere, the Sun appears white rather than any single colour.

Detailed explanation-3: -If we add up all the light coming from galaxies (and the stars within them), and from all the clouds of gas and dust in the Universe, we’d end up with a colour very close to white, but actually a little bit ‘beige’.

Detailed explanation-4: -There is no atmosphere in the outer space. We see the sky blue because scattering happens due to the particles in the atmosphere. The reason for scattering of light is the colloidal particles in the atmosphere which refract the light in different directions.