A 100-pound person on Earth would weigh 38 pounds on Mars.
102
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
The heart of an astronaut actually gets smaller when in outer space.
216
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
Some asteroids have other asteroids orbiting them.
131
The earth rotates more slowly on its axis in March than in September.
145