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

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.
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.
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.
The book is drawn from Fluxo, a free iPhone app. If you like the format, the app has more.
Free to read, print and share unchanged. Please don't sell it. Also available as a free calendar subscription.