In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Jupiter is bigger than all the other planets combined.
254