The heart of an astronaut actually gets smaller when in outer space.
216
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The earth travels through space at 660,000 miles per hour.
189
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
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14