One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
Pluto is smaller than Russia.
9
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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.
6