The sky is the space above the surface of the Earth. The sky is blue; there are also clouds, rain, snow, rainbow in it.
During sunset the sky becomes horizontal pink and later dark. Also, there are the stars and/or the Moon.
The sky is blue color during the day.
Source of image:
https://www.shutterstock.com/image-photo/real-amazing-panoramic-sunrise-sunset-sky-1917169625
