The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
The heart of an astronaut actually gets smaller when in outer space.