The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The heart of an astronaut actually gets smaller when in outer space.
216
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The ashes of the man who discovered Pluto are currently en route to dwarf planet, scheduled to arrive on the 14th of July, 2015.
11
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221