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At left, EHT 2019, the original image of the black hole published in 2019 — and at right, PRIMO: the improved version that uses the researchers’ machine learning algorithm. (Image: Event Horizon Telescope)

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At left, EHT 2019, the original image of the black hole published in 2019 — and at right, PRIMO: the improved version that uses the researchers’ machine learning algorithm. (Image: Event Horizon Telescope)At left, EHT 2019, the original image of the black hole published in 2019 — and at right, PRIMO: the improved version that uses the researchers’ machine learning algorithm. (Image: Event Horizon Telescope)

At left, EHT 2019, the original image of the black hole published in 2019 — and at right, PRIMO: the improved version that uses the researchers’ machine learning algorithm. (Image: Event Horizon Telescope)