Gliding through the faint star fields of Serpens Cauda, Comet C/2025 A6 (Lemmon) displays its soft green glow as it approaches its November 2025 perihelion. The color results from diatomic carbon fluorescing in sunlight, while a pale dust tail streams away from the nucleus. Captured under the crisp, dark skies of Flagstaff, Arizona, this image reveals the comet as it drifts among the distant stars of Serpens, a subtle reminder of the dynamic nature of our Solar System.

A long-period comet originating in the Oort Cloud, C/2025 A6 (Lemmon) circles the Sun roughly every 1,350 years. Around this date it lay about 0.6 AU from Earth and 0.53 AU from the Sun, shining near 5th magnitude, visible through binoculars to northern observers after dusk. As it continues toward perihelion, its tail and coma are expected to brighten and lengthen, providing a rewarding target for wide-field imaging through early November.