Astronauts cannot burp in space.
232
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Lightning strikes about 6,000 times per minute on this planet!
158
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Sound doesn't travel in space.
255