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Crash Course Astronomy
The Oort Cloud: Crash Course Astronomy #22
Season 1
Episode 22
Now that we're done with the planets, asteroid belt, and comets, we're heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system.
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Get to know host Phil Plait and begin with answering a simple question: what is astronomy?