The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Summer on Uranus lasts for 21 years.
358
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The population of the Earth has more than doubled since 1950.
151