The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The Earth gets 100 tons heavier every day due to falling space dust.
673
If two pieces of metal touch in space, they become permanently stuck together.
808
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Pluto is smaller than Russia.
9
Astronauts cannot burp in space.
232
A comet's tail always points away from the sun.
2