On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
A comet's tail always points away from the sun.
2
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
Jupiter is bigger than all the other planets combined.
254
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46