The population of the Earth has more than doubled since 1950.
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The earth travels through space at 660,000 miles per hour.
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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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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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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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Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
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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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Lightning strikes about 6,000 times per minute on this planet!
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