An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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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The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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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.
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The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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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.
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