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JWST May Have Spotted a Fifth Planet in the HR 8799 System
The James Webb Space Telescope may have detected a previously unknown faint source in the inner region of the famous HR 8799 planetary system. Located about 130 light-years away, HR 8799 is already known for four directly imaged giant planets. In a preprint submitted on 9 September 2026, researchers report a weak source in JWST…