NASA's Mars Exploration Rover Spirit captured this stunning view as the sun sank below the rim of Gusev crater on Mars.

If clouds and fog hang low in the sky, though, the sunset could be muted, especially at the coast. Mid- and high-level clouds come in a variety of forms, including altocumulus and cirrus, also ...

Tokyo is a city that transforms dramatically from day to night, and there’s no better place to witness this change than from ...

Therefore, despite more scattering of violet color, we see the sky blue. Why does the sky look red at sunrise and sunset? During sunrise and sunset, the sun's rays have to travel a longer distance ...