🔬 Science 5d ago · Paul Scott Anderson

Comet 3I/ATLAS has methane, unexpected discovery reveals

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Comet 3I/ATLAS has methane, unexpected discovery reveals
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View larger/ full image. | This image of Comet 3I/ATLAS shows the interstellar comet shining against a background of stars. The European Space Agency’s JUICE spacecraft obtained this image and other data on November 6, 2025. New analysis of data from the James Webb Space Telescope shows that Comet 3I/ATLAS has methane, and a lot of it. Image via ESA/ Juice/ JANUS.

Comet 3I/ATLAS is the 3rd known interstellar object to enter our solar system. We are still learning about its composition.
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