The heart of an astronaut actually gets smaller when in outer space.
216
The earth travels through space at 660,000 miles per hour.
189
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
Venus is the only planet that rotates clockwise.
310
Earth is the only planet in our solar system that's not named after a god or goddess.
17