Science ❯ Astronomy ❯ Celestial Objects
3I/ATLAS Interstellar Comets 3I/Atlas C/2025 A6 (Lemmon) C/2023 A3 (Tsuchinshan-ATLAS) Observation Techniques C/2025 A6 Lemmon Comet C/2023 A3 Comet 12P/Pons-Brooks Comet Lemmon Tsuchinshan-Atlas Halley's Comet Star of Bethlehem Comet 3I/ATLAS Dark Comets Comet Characteristics Comet C/2025 A6 (Lemmon) Oumuamua 12P/Pons-Brooks Interstellar Objects Characteristics C/2025 R2 (SWAN) 31/ATLAS Historical Comets C/2023 A3 Tsuchinshan-Atlas Interestellar Comets Swan and Lemmon 2I/Borisov Tsuchinshan-ATLAS Observations Lemon Comet Oort Cloud Visibility C/2023 A3 Tsuchinshan-ATLAS Comet SWAN C/2025 V1 (Borisov) Comet Tsuchinshan-ATLAS Comet A3 Comet A6 Lemmon C/2025 A4 (Lemmon) Comet C/2025 R2 (SWAN) C/2024 S1 Comet R2 SWAN 109P/Swift-Tuttle Rock-Comet Comet Predictions C/2025 A6 Comet Nishimura Comet History C/2025 K1 (Atlas) Specific Comet Names Appearance Specific Comets Comet 13P/Olbers Interstellar Comet 3I/ATLAS Comet R3 PanSTARRS C/2025 F2 (SWAN) Historical Significance Discovery Programs Perihelion Events Comet 109P/Swift–Tuttle C/2023A3 Tsuchinshan-ATLAS Interestellar Objects Comet 21/Borisov Long-Period Comets Comet 31/ATLAS Comet Pan-STARRS Distance from Earth Formation C/2025 R3 (Panstarrs) Halleyscher Komet Solar System Main-Belt Comets Observation 311P/Pan-STARRS Unusual Characteristics Swift-Tuttle Comet 3I Atlas Comet Composition 3I/ATLAS Comet Comet 24P/Schaumasse Comet C/2025 R3 C/2024 S1 ATLAS Comet 2023 A3 C/2025 R3 (PanSTARRS) Visibility Predictions Comet Observations Borisov Comet Lemmon C/2023 H2 Other Notable Comets Comet Behavior 3200 Phaethon C/2024 G3 (Atlas) 3l/ATLAS Visibility Techniques Discovery of 3I/ATLAS Kreutz Comets Comet 2P/Encke Comet ATLAS (C/2025 K1) Halley
The null finding sets quantitative upper limits on transmitter power by demonstrating the Allen Telescope Array's rapid-response sensitivity to new interstellar objects.
