If two pieces of metal touch in space, they become permanently stuck together.
808
Summer on Uranus lasts for 21 years.
358
Pluto is smaller than Russia.
9
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11