Any free-moving liquid in outer space will form itself into a sphere due to surface tension.
When the Moon is directly above your head or if you stand at the equator, you weight slightly less.
Saturn would float if you would put it in water.
The Sun’s core releases the the equivalent of 100 billion nuclear bombs every second.
Traveling at the speed of light it would still take you over 4 years to reach the Sun’s nearest neighbor star.
Earth is the only planet that has plate tectonics!
The only planet that rotates on its side like a barrel is Uranus.
The only planet that spins backwards relative to the others is Venus.