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Astronomers Detect Youngest Exoplanet

Astronomers say they have found the youngest planet ever discovered outside our solar system. The planet, called K2-33b, which was detected by the Kepler space telescope, is only 5 to 10 million years old and just slightly larger than Neptune. Unlike Neptune, which orbits the sun every 165 years, K2-33b travels around its star every five days. K2-33b is 10 times closer to its star than Mercury is to the sun. "Our Earth is roughly 4.5 billion years old," said Trevor David of...

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