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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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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The population of the Earth has more than doubled since 1950.
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A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
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Astronauts get taller when they are in space.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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41% of the moon is not visible from earth at any time.
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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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