Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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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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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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A comet's tail always points away from the sun.
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