Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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
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
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
The earth rotates more slowly on its axis in March than in September.
145
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147