There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The earth rotates more slowly on its axis in March than in September.
145
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
Today's top fuel dragsters take off with more force than the space shuttle.
120
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194