More than 20 million meteoroids enter Earth's atmosphere every day.
139
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Jupiter is bigger than all the other planets combined.
254
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
If two pieces of metal touch in space, they become permanently stuck together.
808
The heart of an astronaut actually gets smaller when in outer space.
216