Pictured above is the Stickney crater on Phobos, one of Mars' moons. It is named for the mathematician Chloe Angeline Stickney. Her husband, an astronomer, discovered the moons in 1877 and then found the crater. The crater is over half the diameter of the moon so it likely collided with another small moon sized object. Telescopes today permit us to see things in space with this sort of picture. There are strange grooves on the moon and crater and astronomers are unsure of what they may be for they look as if something had been brought across the surface. It is an awesome picture and discovery about one of Mars' moons.
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