A comet with a nucleus larger than the state of Rhode Island is heading our way, but Earth is in no danger of a 'Don't Look Up' situation, astronomers say
Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A comet with a nucleus larger than the state of Rhode Island is heading our way, but Earth is in no danger of a"Don't Look Up" situation, astronomers say.
Although comets are most recognizable for their streaming tails, which can stretch for millions of miles, the heart of a comet is its solid nucleus. This nucleus is made of ice and dust, which forms a dirty snowball. While most of the known comet nuclei measure a few miles across, astronomers using the Hubble Space Telescope spotted Comet C/2014 UN271 with a nucleus that reaches 85 miles across. That's more than twice the width of Rhode Island.
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