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Found Largest Comet Ever...
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A comet C/2014 UN271 (Bernardinelli-Bernstein) with a nucleus 50 times bigger than normal is barrelling towards Earth at 22,000 miles per hour.
Nasa's Hubble telescope has determined the comet's icy nucleus has a mass of about 500 trillion tonnes and is 85 miles (137km) wide - larger than t...
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How long would it take a spacecraft to reach the nearest galaxy?
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