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Asteroids and Comets | Science Trek | PBS LearningMedia

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!

pbslearningmedia.org2016年10月25日

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