Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
If two pieces of metal touch in space, they become permanently stuck together.
808
Pluto is smaller than Russia.
9