2025-11-19 NASA
**インターステラー天体(interstellar object) とは、太陽系の外(他の恒星系)から飛来し、太陽系を通過していく天体 のこと。
An annotated version of the image of 3I/ATLAS captured by NASA’s Mars Reconnaissance Orbiter shows the trajectory of the interstellar comet along with a scale bar. The image was captured by the spacecraft’s High Resolution Imaging Science Experiment (HiRISE) camera on Oct. 2, 2025. NASA/JPL-Caltech/University of Arizona
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