The heart of an astronaut actually gets smaller when in outer space.
216
Some asteroids have other asteroids orbiting them.
131
It 'snows' metal on Venus.
13
Astronauts cannot burp in space.
232
Lightning strikes about 6,000 times per minute on this planet!
158
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
Pluto is smaller than Russia.
9