Mars lake was discovered using the MARSIS radar on board the "Mars Express" orbiter, and the profiles were collected between May 2012 and December 2015. The lake is centered at 193°E, 81°S, a flat area that does not exhibit any peculiar topographic characteristics. It is mostly surrounded by higher ground except on its eastern side, where there is a depression. Mars has two relatively small (compared to Earth's) natural moons, Phobos (about in diameter) and Deimos (about in diameter), which orbit close to the planet. Asteroid capture is a long-favored theory, but their origin remains uncertain. Both satellites were discovered in
How Much for Just the Planet? How Much for Just the Planet? How Much for Just the Planet? is a 1987 "Star Trek" tie-in novel by John M. Ford. In the novel, large deposits of dilithium are detected on a colony planet, and delegations are sent by the United Federation of Planets and the Klingon Empire to negotiate for mining rights (neither able to openly fight against the other because of the "Organian Lightbulbs", a reference to the Organians from the original series). They find the planet Direidi and its inhabitants to be very strange indeed. Planet inhabitants occasionally break into song to explain their narratives