Astronauts get taller when they are in space.
224
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
The heart of an astronaut actually gets smaller when in outer space.
216
Jupiter's moon Ganymede, is larger than the planet Mercury!
149