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31 Gravity Facts

Moons, planets, orbits and falling things. Short, accurate facts about gravity, one a day.

31 Gravity Facts free eBook cover

On iPhone or iPad

  1. Tap Open in Apple Books.
  2. When the download finishes, tap it and choose Books (or Share → Books).
  3. It stays in your library, offline. On a Mac, double-click the EPUB.

Read the first few

Day 1

The Moon's surface gravity is about 1.62 m/s², roughly one-sixth of Earth's 9.81 m/s².

Now flip it: one quick run in a gravity game makes a good 60-second break.

Day 2

Mars pulls at about 3.71 m/s², around 38% of Earth's gravity.

Now flip it: one quick run in a gravity game makes a good 60-second break.

Day 3

Jupiter's gravity at its cloud tops is about 24.8 m/s², roughly 2.5 times Earth's.

Now flip it: one quick run in a gravity game makes a good 60-second break.

Where this comes from

The book is drawn from Fluxo, a free iPhone app. If you like the format, the app has more.

Fluxo: Gravity RunnerFree on the App Store for iPhone
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Free to read, print and share unchanged. Please don't sell it. Also available as a free calendar subscription.