Since escape velocity depends on the mass of the planet or moon that a spacecraft is blasting off of, a spacecraft leaving the moon's surface could go slower than one blasting off of the Earth, because the moon has less gravity than the Earth. On the other hand, the escape velocity for Jupiter would be many times that of Earth's because Jupiter is so huge and has so much gravity. Body Mass Escape Velocity in Kilometers/ Second Escape Velocity in Miles/Hour Ceres (largest asteroid in the asteroid belt) 1,170,000,000,000,000,000 kg .64 km/sec 1430.78 mph The Moon 73,600,000,000,000,000,000 kg 2.38 km/sec 5320.73 mph Earth 5,980,000,000,000,000,000,000 kg 11.2 km/sec 25038.72 mph Jupiter 715,000,000,000,000,000,000,000,000 kg 59.5 km/sec 133018.2 mph Sun 1,990,000,000,000,000,000,000,000,000 kg 618. km/sec 1381600.8 mph Sirius B (a white dwarf star) 2,000,000,000,000,000,000,000,000,000 kg 5,200. km/sec 11625120 mph One reason that manned missions to other planets are difficult to plan is that a ship would have to take enough fuel into space to blast off of the other planet when the astronauts wanted to go home. The weight of the fuel would make the spaceship so heavy it would be hard to blast it off of Earth! [[[ Nonsense. The ship need not land! Orbit the ship & use small shuttles. ]]] ---------------- The land at the equator is moving 1670 km per hour, and land halfway to the pole is only moving 1180 km per hour, so launching from the equator makes the spacecraft move almost 500 km/hour faster once it is launched.