There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Summer on Uranus lasts for 21 years.
358
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
Earth is the only planet in our solar system that's not named after a god or goddess.
17
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
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175