The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The heart of an astronaut actually gets smaller when in outer space.
216
Sound doesn't travel in space.
255
The Earth gets 100 tons heavier every day due to falling space dust.
673
Earth is the only planet in our solar system that's not named after a god or goddess.
17