41% of the moon is not visible from earth at any time.
103
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
If two pieces of metal touch in space, they become permanently stuck together.
808
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Pluto is smaller than Russia.
9
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178