NASA's Dawn spacecraft is starting to send back photos of Vesta, the second largest object in the asteroid belt. The large asteroid, believed to be a protoplanet, is 300,000 miles away and yet we're able to get a close up view of the big rock tumbling through space.
■Class discussion: Do scientific accomplishments like this interest you? Want to know more: Do some research to answer some questions the video doesn't explain. Where is the asteroid belt? What's an asteroid? What's the difference between an asteroid and a comet?
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