Asteroids and Comets | Science Trek | PBS LearningMedia
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Asteroids and Comets | Science Trek | PBS LearningMedia
Asteroids are small, rocky objects left over from the formation of our solar system. Comets are leftovers too, made of dust, rock and ice. These small worlds can tell us what the early solar system was like. On this Science Trek, travel to the asteroid Bennu, learn about Lucy and the Trojans and much more!
2016年10月25日
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Asteroids are ancient rocky bodies leftover from the early formation of our Solar System, and many of them are rich in metals and minerals. Scientists believe that future interstellar missions may rely on these asteroids as fuel and resource stations, especially as humanity works toward developing long-distance space travel beyond our Solar System. With probes like Voyager already drifting into interstellar space, the idea of using asteroids as stepping stones for deep space exploration is becom
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