There are two golf balls sitting on the moon.
721
Summer on Uranus lasts for 21 years.
358
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147