APOD: 2009 March 16 - Martian Moon Deimos from MRO

Martian moon Deimos photographed from Mars Orbiter

Cool fact of the day: "The existence of two Martian moons was predicted around 1610 by Johannes Kepler, the astronomer who derived the laws of planetary motion. In this case, Kepler's prediction was not based on scientific principles, but his writings and ideas were so influential that the two Martian moons are discussed in works of fiction such as Jonathan Swift's Gulliver's Travels, written in 1726, over 150 years before their actual discovery."