Question

when there is no sun so what is the colour of sky​

Answer 1

Answer:

The sky appears blue because the sunlight is scattered by the gas molecules in the atmosphere - a phenomenon known as Rayleigh scattering - named after the discoverer - a British physicist who also discovered Argon - Lord Rayleigh (1842-1919). So, if there was no atmosphere, the sky would appear black.

Answer 2

Then we cannot see .. so the colour will be black