Escape velocity is the speed that you have to have in order to 'escape' from the surface of a planet to some distance in space far from its surface, usually defined as 'infinity'. Here are the escape velocities for the different bodies in our solar system:
Body Kilometers/sec Miles/hour ......................................................... Mercury 4.2 Venus 10.3 Earth 11.5 Mars 5.0 Jupiter 61.0 Saturn 37.0 Uranus 22.0 Neptune 25.0 Pluto 1.0 ? Moon 2.4 Sun 617.7 .........................................................