A comet's tail always points away from the sun.
2
If two pieces of metal touch in space, they become permanently stuck together.
808
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
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
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