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Comets

Interstellar Objects Characteristics Halley's Comet Swift-Tuttle Comet 109P/Swift-Tuttle Interstellar Comets 3I/ATLAS Observation C/2023 A3 (Tsuchinshan-ATLAS) C/2023 A3 Tsuchinshan-ATLAS

Webb and SPHEREx Confirm CO2-Dominated Coma on Interstellar Comet 3I/ATLAS

New measurements fix an unusually high CO2-to-water ratio, quantifying gas output ahead of the object’s late-October perihelion.

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Webb and SPHEREx Confirm CO2-Dominated Coma Around Interstellar Comet 3I/ATLAS

Spacecraft Observations Sought as Loeb Raises Nuclear-Powered Theory for Interstellar Object 3I/ATLAS

Hubble Captures Sharpest View of Interstellar Visitor 3I/ATLAS, Strengthening Comet Case

Sharp Hubble Images Confirm 3I/ATLAS as Comet; Juno Intercept Study Advances

Interstellar Comet 3I/ATLAS Exhibits Cometary Activity at Record 209,000 km/h

Bright Gibbous Moon Dims Perseid Meteor Shower Peak

Bright Gibbous Moon Limits Perseids Peak to About 25 Meteors an Hour

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

Waning Gibbous Moon to Dim Perseid Meteor Shower’s Peak Display

Moonlight Dims Perseid Meteor Shower at Its Peak

Hubble Images Spur Juno Mission Study for Interstellar Comet

Deep-Sea Cores Uncover Possible Cometary Debris at Younger Dryas Onset

Waning Gibbous Moon Threatens Perseid Meteor Peak, Observers Advised to Chase Earthgrazers and Livestreams

Mission Studies Spotlight Juno Flyby of Interstellar Comet 3I/ATLAS

Moonlight Set to Dampen This Year’s Perseid Meteor Shower Peak

ArXiv Study Exposes Daunting Propulsion Demands for 3I/ATLAS Intercept

Rubin Observatory Captures Pre-Discovery Video of Natural Interstellar Comet 3I/ATLAS

Southern Delta Aquariids and Alpha Capricornids Peak Before Dawn

Astronomers Confirm 3I/ATLAS as Icy Interstellar Comet, Not Alien Probe