Summer on Uranus lasts for 21 years.
358
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Venus is the only planet that rotates clockwise.
310
Astronauts get taller when they are in space.
224
The earth travels through space at 660,000 miles per hour.
189
Pluto is smaller than Russia.
9
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5