An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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41% of the moon is not visible from earth at any time.
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Jupiter's moon Ganymede, is larger than the planet Mercury!
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A comet's tail always points away from the sun.
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The temperature of the earth's interior increases by 1 degree every 60 feet down.
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A 100-pound person on Earth would weigh 38 pounds on Mars.
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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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