“ The inner region of a galaxy rotates as a solid body. But, beyond that, like the planets around the Sun following Kepler’s third law, the outer provinces rotate progressively more slowly. ”
Carl Sagan, Cosmos (1980). copy citation
Author | Carl Sagan |
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Source | Cosmos |
Topic | law planet |
Date | 1980 |
Language | English |
Reference | |
Note | |
Weblink |