A comet's tail always points away from the sun.
2
Pluto is smaller than Russia.
9
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
In outer space there exists a gigantic cloud of alcohol which can be used to produce 400 trillion trillion pints of beer.
31