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A bright green comet, C/2025 A6 (Lemmon), passed Earth at 56 million miles on October 21, 2025, and is visible before sunrise through early November.
A bright green comet, C/2025 A6 (Lemmon), visible in the predawn sky, reached its closest point to Earth on October 21, 2025, at 56 million miles away.
Discovered in January, it's the year's brightest comet and remains viewable into early November, best seen before sunrise with binoculars.
Photographed over Cumbria, England, despite cloudy weather, it has an orbital period of about 1,350 years.
Another comet, Swan, passed near Earth around the same time but is better seen from the southern hemisphere.
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Un brillante cometa verde, C/2025 A6 (Lemmon), pasó por la Tierra a 56 millones de millas el 21 de octubre de 2025 y es visible antes del amanecer hasta principios de noviembre.