Subj : 3I/ATLAS NON-GRAVITATIONAL ACCELERATION
To   : All
From : Mike Powell
Date : Wed Dec 17 2025 08:28:21

Space Weather News for Dec. 16, 2025
https://spaceweather.com

THE NON-GRAVITATIONAL ACCELERATION OF 3I/ATLAS:  New data from NASA's Psyche
spacecraft and ESA's Mars Trace Gas Orbiter confirm that interstellar comet
3I/ATLAS is not moving under the force of gravity alone. It has a
"non-gravitational acceleration." The effect can be explained entirely by
cometary outgassing, and allows astronomers to weigh the comet from afar. Full
story @ Spaceweather.com (https://spaceweather.com) .

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