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A pair of once-in-a-lifetime comets will rocket through our skies this October. It’s a rare treat for skywatchers, as they won’t be back again for hundreds of years.
The comets — C/2025 A6 (Lemmon) and C/2025 R2 (SWAN) — look similar from our perspective. You can spot these green gaseous globes and their streaming tails now. But the comets will be even easier to see later this month.
SWAN will shine the brightest around Oct. 20, NBC News reports. Just a day later, on Oct. 21, Lemmon will make its peak…
