Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
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
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Today's top fuel dragsters take off with more force than the space shuttle.
120
Lightning strikes about 6,000 times per minute on this planet!
158
The earth travels through space at 660,000 miles per hour.
189
Jupiter's moon Ganymede, is larger than the planet Mercury!
149