The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Buzz Aldrin’s mother’s maiden name was Moon.
9
Some asteroids have other asteroids orbiting them.
131
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Earth is the only planet in our solar system that's not named after a god or goddess.
17