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  1. Hace 14 horas · Missions to the moons of Mars. Phobos' Stickney Crater. Deimos (lower left) and Phobos (lower right) compared with the asteroid 951 Gaspra. Phobos by Mars Global Surveyor in 1998 [49] There have also have been proposed missions dedicated to explore the two moons of Mars, Phobos and Deimos.

  2. Hace 7 horas · However, Mars is a different world, and there is no reason that lava tubes do not exist on this planet. As a matter of fact, the gravity on Mars is much weaker than Earth's, a condition that would ...