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Comets

3I/ATLAS Characteristics Interstellar Comets Halley's Comet Interstellar Objects Comet 3I/ATLAS Oort Cloud Comet Discovery 3I/Atlas Comet 24P/Schaumasse Swift-Tuttle Comet 96P/Machholz 12P/Pons-Brooks Comet 12P/Pons-Brooks Thatcher Comet Discovery Asteroids Comet 3I/Atlas 311P/PanSTARRS Detection Methods 109P/Swift-Tuttle Unidentified Objects C2025R2 Dark Comets Comet Lemmon Visibility Composition and Origin 1P/Halley 8P/Tuttle 3200 Phaethon Observations C/2025 V1 Comet Characteristics 2I/Borisov Observation Historical Context C/2025 R2 Comet Swift-Tuttle Naked-eye Comets Periodic Comets C/2023 A3 Tsuchinshan-Atlas Observation Techniques Tsuchinshan-ATLAS C/2023 A3 (Tsuchinshan-ATLAS) Kreutz Sungrazers 'Oumuamua Meteor Showers

ALMA Finds Interstellar Comet 3I/ATLAS Strikingly Methanol‑Rich With Unusual Outgassing

Preprint analyses using ALMA with JWST indicate a cold, ancient origin as the fading visitor nears a brief pass by Jupiter.

SPHEREx Finds Interstellar 3I/ATLAS Has Become a Fully Active Comet After Perihelion

No Alien Signals Detected From Interstellar Visitor 3I/ATLAS in Green Bank Scan

2026 Sky Guide: Total Eclipse Over Iceland and Spain as NASA Targets Early-Year Artemis II

Interstellar Comet 3I/ATLAS Shows Signs of Global Ice Volcanoes, Study Finds

Orionid Meteor Shower Set to Peak Under Moonless Skies Next Week

Orionid Meteor Shower Begins, With Peak Oct. 21–22 Under Moonless Skies

Hubble and Infrared Observations Show 3I/ATLAS Is an Active Interstellar Comet