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NASA infrared telescope finds water, CO2 and organics streaming from interstellar comet 3I/ATLAS as it departs the solar system

NASA's infrared telescope detected water vapor, carbon dioxide and organic compounds streaming from interstellar comet 3I/ATLAS as it departs the solar system, observations made two months after the object's closest approach to the Sun. The spectroscopic signatures indicate ongoing volatile release well beyond perihelion.

Discovered 2026-02-06T11:55:22.368958-08:00 | 2026-02-06T11:55:22.368958-08:00

Briefing

What Hype is tracking

The detection of water, CO2 and organic molecules provides direct compositional constraints on an interstellar visitor and complements in‑space observations from missions like Europa Clipper and instrument suites on ESA's JUICE.
Continued volatile release two months after perihelion changes mass‑loss and coma models for 3I/ATLAS, a key input for feasibility and timing in interception studies such as the recent ESA intercept requirements analysis.
These observations underscore the value of coordinated tracking and in‑space assets for trajectory refinement and rapid follow‑up, building on trajectory improvements achieved with ExoMars TGO data and the global observation campaign around the object (source:3dc4a26e-9731-4b70-834a-e010397ed1c0).

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