Summary:
- The James Webb Space Telescope has observed a supernova that is challenging our understanding of the universe's expansion.
- The supernova, named Earendel, appears to be the most distant individual star ever observed, with its light taking over 12.9 billion years to reach Earth.
- The observation of Earendel's supernova is providing new insights into the early universe and the evolution of galaxies, potentially rewriting the cosmic rules we thought we knew.