Summer on Uranus lasts for 21 years.
358
Jupiter is bigger than all the other planets combined.
254
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
NASA invented baby food as we know it today.
7
According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
14
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
Earth is the only planet in our solar system that's not named after a god or goddess.
17