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Voyager carries greetings in 55 languages

The Voyager Golden Record holds spoken greetings in 55 languages and 115 images.

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A committee chaired by Carl Sagan chose the contents. The record also carries natural sounds such as surf, wind, thunder, birds, and whales.

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About 48 tons of space rock fall on Earth daily

Scientists estimate that about 48.5 tons of meteoritic material falls on Earth each day.

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A year on Neptune lasts 165 Earth years

Neptune takes about 165 Earth years to complete one orbit of the Sun.

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Neptune was found with mathematics

Neptune was the first planet located through mathematical predictions rather than by regular observation of the sky.

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