There are two golf balls sitting on the moon.
721
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
Astronauts get taller when they are in space.
224
The Earth gets 100 tons heavier every day due to falling space dust.
673
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
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
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178