If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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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Summer on Uranus lasts for 21 years.
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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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If NASA sent birds into space they would soon die; they need gravity to swallow.
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There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
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