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Comet C/2019 Y4 ATLAS, the one we were hoping to see putting on a great show, has shattered both its and our hearts. Its nucleus disintegrated and Saturday night I could see 3, possibly 4, main fragments.
More about the comet here: https://earthsky.org/todays-image/the-shattered-heart-of-comet-c-2019-y4-atlas