A faint green comet, officially known as C/2025 A6 (Lemmon), was briefly spotted over Bengaluru’s western horizon on Saturday evening, giving skywatchers a unique opportunity to see an icy object from the outer Solar System right within the city limits.

Comet Lemmon was discovered in January 2025 at the Mount Lemmon Observatory in Arizona, U.S., and has been gradually brightening as it approaches the Sun.

It can currently be seen from the Northern Hemisphere with binoculars, although its brightness fluctuates due to outgassing, which is the release of gas and dust as solar radiation warms the comet’s surface.

The green hue seen in the images is not from reflection but rather fluorescence from diatomic carbon (C₂), a molecule that gives off green light when energized by ultraviolet sunlight.

This gas is only found in the comet’s coma and breaks apart quickly, which is why the tail appears colorless.

Capturing the comet from Bengaluru, a city notorious for its heavy light pollution, was only feasible under clear post-monsoon skies and with precise timing.

Subscribe My Channel





Discover more from Connect2ConnectOnline

Subscribe now to keep reading and get access to the full archive.

Continue reading