A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Summer on Uranus lasts for 21 years.
358
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
Pluto is smaller than Russia.
9