Science ❯ Astronomy ❯ Celestial Events
Comet Lemmon C/2025 A6 (Lemmon) 3I/ATLAS Tsuchinshan-ATLAS Swift-Tuttle Tsuchinshan-Atlas C/2023 A3 (Tsuchinshan-ATLAS) C/2023 A3 Tsuchinshan-ATLAS Comet C/2025 A6 (Lemmon) Meteor Showers Comet 109P/Swift-Tuttle C/2025 A6 Lemmon Comet C/2023 A3 (Tsuchinshan-ATLAS) C/2025 R2 (SWAN) Visibility Comet Tsuchinshan-ATLAS Comet C/1861 G1 Thatcher Debris C/2023 A3 Tsuchinshan–ATLAS C/2025 K1 (ATLAS) Comet 21P/Giacobini-Zinner Observation Techniques Comet Swift-Tuttle Comet 12P/Pons-Brooks Swift-Tuttle Comet Halley's Comet C/2023 A3 Tsuchinshan-Atlas Comet Thatcher Sozin's Comet 12P/Pons-Brooks Characteristics Recommended Viewing Times Pons-Brooks Comet Specific Comets Comet SWAN25F 1P Halley Comet C/2024 E1 (Wierzchoś) Comet Lemmon C/2025 A6 Cometary Particles Donald Machholz Komet Swan Komet Lemmon Astrophotography Impact Events Comet 1P/Halley Naked-Eye Comets C/2025 Lemmon Comet 21P Giacobini-Zinner Cometa C/2025 R2 Comet SWAN Comet ATLAS Orionid Meteor Shower 21P/Giacobini-Zinner Comet R2 Swan Weather Conditions Comet Observations Public Interest Comet Swan Hobby Astronomy Comet Halley 3I-ATLAS C/2025 R2 (Swan) Cometa Lemmon Comet Temple-Tuttle Comet 55P/Tempel-Tuttle Comet ATLAS (C/2025 K1) Comet 8P/Tuttle Historical Theories Comet 24P/Schaumasse Cometary Origins Comet 109/P Swift-Tuttle Notable Comets Comet A3 Observation Comet A3 (Tsuchinshan-ATLAS) Tsuchinshan–ATLAS C/2023 A3 (Tsuchinshan–Atlas) Comet A3 (C/2023 A3) Comet Tsuchinshan-Atlas C/2023 A3 Comet C/2023 A3 (ATLAS-Tsuchinshan) C2023-A3 (Tsuchinshan-Atlas) C2023-A3 Tsunchinshan-Atlas C/2023A3 Tsuchinshan-ATLAS Comet NEOWISE Tsuchinshan-ATLAS Comet C/2023 A3 (Tsuchinshan-Atlas) Ancient Comets A3 (Tsuchinshan-ATLAS) Comet Encke Encke's Comet Periodic Comets G3 ATLAS Comet Atlas C/2024 G3 Comet C/2024 G3 (ATLAS) Comet Pons-Brooks
Fresh spacecraft data point to volatile‑driven activity with unusual chemistry.
