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 is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Sound doesn't travel in space.
255
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277