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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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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There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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