Summary:

- The James Webb Space Telescope has discovered a new planet orbiting the star Kepler-51, which was previously observed by the Kepler Space Telescope.
- The newly discovered planet, named Kepler-51d, is a super-Earth with a radius about 7 times that of Earth and a mass about 50 times that of Earth.
- The discovery demonstrates the power of the James Webb Space Telescope to study exoplanets and expand our understanding of planetary systems beyond our own.