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This is inspired by a comment by JDÅ‚ugosz. Planets change their angular velocity when they orbit stars because they follow Keplerian orbits with (typically) non-zero eccentricity. The bottom line...
#1: Attribution notice removed
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System
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2020-06-01T14:13:45Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/q/21550 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/