A comet's tail always points away from the sun.
2
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
It takes eight and a half minutes for light to get from the sun to earth.
159
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Lightning strikes about 6,000 times per minute on this planet!
158