Read, Watch or Listen

Comet C/2025 A6 (Lemmon) has surged in brightness ahead of perihelion, raising hopes it may be visible to the naked eye by mid to late October. Observers report it has climbed from magnitude +21.5 in January to about +5.7, though glare from the waning gibbous moon could hinder views in the coming week. The comet will pass near Alkaphrah in Ursa Major, head toward Cor Caroli, sit in Boötes at its Oct. 21 Earth flyby, then slip beneath Serpens Oct. 26–27. Best viewing shifts from pre-dawn northeast early month to low northwest evenings near Oct. 21.

Prepared by Olivia Bennett and reviewed by editorial team.