The Earth gets 100 tons heavier every day due to falling space dust.
673
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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
41% of the moon is not visible from earth at any time.
103
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It 'snows' metal on Venus.
13
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115