One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Earth is the only planet in our solar system that's not named after a god or goddess.
17
It 'snows' metal on Venus.
13