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Largest-ever comet cometh! But have no fear, it won’t come near

The four billion-year-old comet has been falling toward the Sun for over one million years.

comet-nucleus-sequence
Sequence showing how the nucleus of Comet C/2014 UN271 was isolated from a vast shell of dust and gas surrounding the solid icy nucleus. Credit: NASA, ESA. Image processing: Alyssa Pagan (STScI)
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