The above is a computer enhanced image of Mercury. The color differences would not normally be viewable with the human eye, but thanks to computer intervention separating the colors out, we can see them. This image was taken by a satellite orbiting Mercury. These colors indicate a lot about Mercury. Some of it, such as the dark area at the bottom, shows a ancient volcanic basin, that had long since dried up. Others show minerals, chemicals, and topology. Overall, the fact that we can see all this from a mere photo is very cool.
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