![]() So a spacecraft has to be much faster than an asteroid to catch up. Right now, landing objects on asteroids is tough since these rocks move at a speed of about 15 miles per second. The idea was dreamed up by NASA's Jet Propulsion Laboratory as a way of using less fuel to land spacecraft on these space rocks. Once the vehicle finishes a ride with one asteroid, it will disconnect and hitch a ride with another. ![]() ![]() The idea is to make a probe - called Comet Hitchhiker - that would "catch rides" on asteroids by spearing them with tethers. NASA engineers say they have come up with an easier way of exploring comets and asteroids in our Solar System: harpooning fast-moving space rocks.
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