The still plugging away Mars Exploration Rover recorded this brilliant footage of a sunset from the viewpoint of a Martian. It seems like the loneliest view in the galaxy. And if you’re wondering why it’s so blue (as opposed to our Earth’s red-orange-ish sunsets) here’s your answer:
The red dust in the atmosphere scatters red light, so when anyone looking around would see a reddish sky. Meanwhile, the red wavelengths are filtered out of the direct path of light from the sun, leaving light towards the bluish end of the color spectrum. Those looking at the sun will see it as blue.