It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
It 'snows' metal on Venus.
13
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16