There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
Sound doesn't travel in space.
255
A comet's tail always points away from the sun.
2
If two pieces of metal touch in space, they become permanently stuck together.
808