What happens to a comet after repeated close passes near the Sun cause it to lose most of its ice?
Answer
The process is known as cometary fading, leaving behind inert rock.
Repeated close passes strip away volatile material, and over thousands of orbits, this process, known as cometary fading, leaves behind only a dark, inert lump of rock or rubble resembling an asteroid.
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The Oort Cloud: Crash Course Astronomy #22 - YouTube
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