The light hitting the earth right now is 30 thousand years old.
163
The Earth gets 100 tons heavier every day due to falling space dust.
673
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Only 55% of Americans know that the sun is a star.
986
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Pluto is smaller than Russia.
9
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
More than 20 million meteoroids enter Earth's atmosphere every day.
139