Astronomy ❯ Celestial Objects

Comets

Comet Lemmon 12P/Pons-Brooks C/2023 A3 Interstellar Comets Long-Period Comets C/2023 A3 Tsuchinshan-ATLAS 3I/ATLAS Interstellar Objects Observation Visibility Comet C/2024 G3 (ATLAS) Comet Nishimura C/2023 P1 (Nishimura) Comet Tsuchinshan-ATLAS Halley's Comet Comet 12P/Pons-Brooks Devil Comet Observation Techniques Non-Periodic Comets Brightness Discovery C/2025 R2 Swan C/2025 K1 Comet C/2025 A6 (Lemmon) Comet SWAN C/2025 A6 Lemmon C/2025 R2 Characteristics Diatomic Carbon Comet A3-Tsuchinshan-ATLAS C/2023 A3 (Tsuchinshan-ATLAS) Comet A3 Comet Tsuchinshan–ATLAS Tsuchinshan-Atlas C/2023 A3 Tsuchinshan–ATLAS Tsuchinshan-ATLAS C/2023 A3 Tsichinshan-ATLAS ATLAS Comet

Comet Lemmon Stays Bright as Final Easy Viewing Window Closes

Rising moonlight now limits viewing to a brief evening window ahead of the Nov. 8 perihelion.

Twin Comets Lemmon and SWAN Light Up Northern Skies as Brief Viewing Window Peaks

Twin Green Comets Enter Prime Viewing Week Before Closest Approaches

Comets Lemmon and SWAN Poised for Best Viewing Oct. 20–21