Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Some asteroids have other asteroids orbiting them.
131
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Astronauts get taller when they are in space.
224
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
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
Pluto is smaller than Russia.
9