Can the sky be white?

Answer 1

Big mirrors, and the ocean....I think not.

The sky appears blue most of the time beacuse the water molecules in the atomsphere act like tiny prisms, refracting the "white" light from the sun. Due to several factors such as the angle between the sun and earth, and the physical properties of water, etc. Blue is the prominate color that we observe. However when the sun sets for instance the sky changes to an orange or red color as these are now more prominent than blue.