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 temperature of the earth's interior increases by 1 degree every 60 feet down.
115
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The heart of an astronaut actually gets smaller when in outer space.
216
The sun is 330,330 times larger than the earth!
190
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
If two pieces of metal touch in space, they become permanently stuck together.
808