Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The sun is 330,330 times larger than the earth!
190
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16