Science

Pluto

Because it is so far from the Sun, astronomers had a hard time measuring Pluto’s size. They finally got it

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Comets

For astronomers, though, a comet's beauty is not just in its appearance, but in its content: A comet is an

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Asteroids

But the next year, astronomers found a second object in a similar orbit, then another, and another. Instead of a

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