Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
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Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Summer on Uranus lasts for 21 years.
358
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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