A 100-pound person on Earth would weigh 38 pounds on Mars.
102
41% of the moon is not visible from earth at any time.
103
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 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
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
More than 20 million meteoroids enter Earth's atmosphere every day.
139