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Altitude of the orbit of the International Space Station (400 km) is 40 thousand x Height of a high-diving platform (10 m)
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Mass of Umbriel (moon of Uranus) (1.17 sextillion kg)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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Click here for Podcast: Andrew Elliott interviewed for New Books Network.