If two pieces of metal touch in space, they become permanently stuck together.
808
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
More than 20 million meteoroids enter Earth's atmosphere every day.
139
A comet's tail always points away from the sun.
2
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9