There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
More than 20 million meteoroids enter Earth's atmosphere every day.
139
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
The heart of an astronaut actually gets smaller when in outer space.
216
Astronauts get taller when they are in space.
224