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The Moon's surface gravity is about 1.62 m/s², roughly one-sixth of Earth's 9.81 m/s².
Gravity is the force everyone feels and almost nobody thinks about. These 31 facts cover planets, black holes, astronauts, GPS satellites and the history of the idea, from Newton's Principia to LIGO's first gravitational-wave detection.
The figures come from standard references such as NASA planetary fact sheets. They're rounded so they're easy to remember and repeat at dinner.
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