James Webb Space Telescope Space Exploration & Science Missions NASA

Webb finds 3I/ATLAS’s ice resembles distant solar-system bodies, while Hubble and Webb probe the primordial outer solar system

NASA’s James Webb Space Telescope found that interstellar object 3I/ATLAS has ice unlike familiar solar-system comets and more like bodies beyond Neptune. Separate Hubble and Webb observations of faint outer-solar-system objects are revealing clues to the solar system’s earliest history.

Discovered 2026-11-02T06:15:11.285194-08:00 | 2026-11-02T06:15:11.285194-08:00

Briefing

What Hype is tracking

3I/ATLAS’s unusual ice composition gives researchers a point of comparison between material formed around another star and icy bodies in the distant outer solar system.
Hubble and Webb observations of small, faint objects beyond Neptune offer evidence about the early solar system; the findings underscore how space telescopes can study both planetary origins and interstellar visitors.

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Space.com Science Daily