Astronomy ❯ Celestial Objects

Comets

Comet Lemmon Interstellar Comets C/2023 A3 12P/Pons-Brooks Long-Period Comets 3I/ATLAS Visibility Observation C/2023 A3 Tsuchinshan-ATLAS Interstellar Objects Non-Periodic Comets Observation Techniques Comet R3 Pan-STARRS Brightness Comet C/2025 R3 (Pan-STARRS) C/2025 R2 Discovery Periodic Comets Comet Nishimura C/2025 R2 Swan Tsuchinshan-Atlas Comet SWAN Devil Comet C/2023 P1 (Nishimura) C/2023 A3 (Tsuchinshan-ATLAS) Asteroid 2003 EH1 Characteristics Comet 12P/Pons-Brooks ATLAS Comet C/2025 R3 PanSTARRS Tsuchinshan-ATLAS C/2025 R3 (PanSTARRS) Comet C/2024 G3 (ATLAS) C/2023 A3 Tsichinshan-ATLAS Comet 10P/Tempel 2 Comet C/2025 A6 (Lemmon) Comet A3 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

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