A comet's tail always points away from the sun.
2
It would take more than 150 years to drive a car to the sun.
569
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Sound doesn't travel in space.
255
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
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