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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Astronauts get taller when they are in space.
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The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
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Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
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Some asteroids have other asteroids orbiting them.
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The Earth gets heavier each day by tons, as meteoric dust settles on it.
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Venus is the only planet that rotates clockwise.
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