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NASA's Webb Detects Methane and Strange Chemistry on Interstellar Comet 3I/ATLAS

Summary by Science Daily
NASA's James Webb Space Telescope has uncovered unusual chemistry in interstellar comet 3I/ATLAS, including the first direct detection of methane on a visitor from another star system. The comet also contains exceptionally high levels of carbon dioxide, making it unlike most comets born in our solar system. Scientists believe the methane was hidden beneath the surface and only emerged after solar heating reached deeper icy layers.

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A sign of extraterrestrial life? Outer space surprises the international scientific community again. NASA confirmed the historical discovery of methane gas in the interstellar comet 3I/ATLAS using the Middle Infrared Instrument (MIRI) of the James Webb Space Telescope. The discovery of this volatile hydrocarbon occurred after the passage of the object near the Sun, suggesting that the gas was protected under deep ice layers. Is methane in the 3I…

The James Webb Space Telescope, developed by NASA, ESA, and CSA, achieved an unprecedented discovery by detecting methane gas (CH4) for the first time in an interstellar object, specifically in comet 3I/ATLAS, a visitor from outside our Solar System. The observations were made using the MIRI (Mid-Infrared Instrument), which allowed scientists to analyze the comet's chemical composition as it moved away from the Sun after its passage through the …

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Azteca Baja California broke the news on Wednesday, June 3, 2026.
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