The sky on the Earth is blue. Could the color of the sky on a planet with an atmosphere be of any color theoretically?
Which colors are the most likely?
I think it would be really awesome to have a planet with a green sky, or a red sky. What conditions would have to be in place for this to happen?
By the way I suspect its impossible for the sky to be white, black, grey, or brown, but maybe this is possible if not at all times during the day, a part of the day?
Does the answer depend on whether the planet is a gas planet or a rocky one? Initially I had in mind a rocky planet, but I suspect a gas planet allows you to cheat a little because gases can be a variety of colors (red even?).