Astronauts cannot burp in space.
232
A comet's tail always points away from the sun.
2
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
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
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The light hitting the earth right now is 30 thousand years old.
163