Astronauts get taller when they are in space.
224
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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The heart of an astronaut actually gets smaller when in outer space.
216
A comet's tail always points away from the sun.
2
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127