One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
A comet's tail always points away from the sun.
2
It takes eight and a half minutes for light to get from the sun to earth.
159
The population of the Earth has more than doubled since 1950.
151
A 100-pound person on Earth would weigh 38 pounds on Mars.
102