Astronomy ❯ Celestial Objects

Comets

Comet Lemmon Interstellar Comets C/2023 A3 12P/Pons-Brooks Long-Period Comets C/2023 A3 Tsuchinshan-ATLAS Visibility Interstellar Objects Non-Periodic Comets 3I/ATLAS Observation Brightness C/2025 R2 Discovery Periodic Comets Comet Nishimura C/2025 R2 Swan Tsuchinshan-Atlas Comet SWAN Comet A3 C/2023 P1 (Nishimura) C/2023 A3 (Tsuchinshan-ATLAS) Asteroid 2003 EH1 Characteristics Comet 12P/Pons-Brooks ATLAS Comet Tsuchinshan-ATLAS Comet C/2025 A6 (Lemmon) Comet C/2024 G3 (ATLAS) C/2023 A3 Tsichinshan-ATLAS Devil Comet Halley's Comet C/2025 K1 C/2023 A3 Tsuchinshan–ATLAS Comet A3-Tsuchinshan-ATLAS Comet Tsuchinshan-ATLAS Short-Period Comets Comet Tsuchinshan–ATLAS C/2025 A6 Lemmon Diatomic Carbon Observation Techniques

Comet Pan‑STARRS Reaches Perihelion Sunday, Closing a Brief Pre‑Dawn Viewing Window

Perihelion marks a short viewing peak for northern skywatchers.

Brightening Comet Pan‑STARRS Enters Pre‑Dawn View for Northern Skywatchers

JUICE Releases Best-Yet Image of Interstellar Comet 3I/ATLAS as Data Flow Begins

Quadrantids Set to Peak Jan. 3–4, but Full Moon Will Mute the Show

Comet Lemmon Stays Bright as Final Easy Viewing Window Closes

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