Ever wonder what a sunset looks like on Mars? If so, then look no further than the image above, captured by the Mars exploration rover Spirit from Gusev Crater. You can see a bluish glow – caused by high altitude dust scattering sunlight around to the night side of the planet – in the sky around and above the Sun. Such a glow can remain visible for up to 2-hours after sunset or before sunrise. Large amounts of dust in the atmosphere cause the reddish tint. Continue reading for more.