Summer on Uranus lasts for 21 years.
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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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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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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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