Summer on Uranus lasts for 21 years.
358
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
If two pieces of metal touch in space, they become permanently stuck together.
808
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Pluto is smaller than Russia.
9
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Mars had an oxygen-rich atmosphere around 4 billion years ago
13