https://www.live-feeds.com/feed/interstellar-comet-likely-far-older-than-solar-system-astronomersContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/interstellar-comet-likely-far-older-than-solar-system-astronomershttps://www.live-feeds.com/feed/interstellar-comet-likely-far-older-than-solar-system-astronomers#u12670Thu, 25 Jun 2026 09:56:20 +0000Astronomers believe the interstellar comet 3I/ATLAS could be up to 12 billion years old. NASA's James Webb Space Telescope is providing clues about its ancient origin and unique chemistry. The object passed by Earth at 1.8 AU and posed no threat.What's confirmed:Interstellar comet 3I/ATLAS was discovered on 1 July 2025 by the Asteroid Terrestrial-impact Last Alert System station.The comet's nucleus is estimated to be less than 1 km in diameter.NASA's James Webb Space Telescope has detected that 3I/ATLAS is unusually rich in carbon dioxide.The comet follows a hyperbolic trajector