Science ❯ Astronomy ❯ Celestial Bodies

Comets

3I/ATLAS Characteristics Interstellar Comets Halley's Comet Comet 3I/ATLAS Oort Cloud Interstellar Objects Comet 24P/Schaumasse Swift-Tuttle 3I/Atlas Comet 96P/Machholz Comet Discovery Dark Comets C/2025 R2 Discovery C/2025 R3 (PANSTARRS) Naked-eye Comets C/2025 K1 (ATLAS) 109P/Swift-Tuttle Asteroids Periodic Comets Tsuchinshan-Atlas Comet Lemmon Unidentified Objects C2025R2 Historical Context C/2023 A3 (Tsuchinshan-ATLAS) Kreutz Sungrazers Comet 12P/Pons-Brooks Comet Swift-Tuttle 8P/Tuttle 2I/Borisov C/2023 A3 Tsuchinshan-ATLAS Observations Observation Meteor Showers Composition and Origin 1P/Halley Visibility Thatcher Comet Comet 10P/Tempel 2 3200 Phaethon Comet Characteristics Comet 41P/Tuttle-Giacobini-Kresák 311P/PanSTARRS C/2025 V1 12P/Pons-Brooks 'Oumuamua Observation Techniques Comet 3I/Atlas Detection Methods Comet 109P/Swift-Tuttle

Hubble Spots First Known Comet Spin Reversal

Uneven gas jets likely flipped the small comet's spin.

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

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