The star, Earendel, is so distant that the starlight glimpsed by the Webb telescope was emitted within the first billion years of the universe
Astronomers have used the James Webb Space Telescope to observe Earendel, the most distant star ever detected. Earendel is so distant that the starlight glimpsed by the Webb telescope was emitted within the first billion years of the universe. The universe is estimated to be about 13.8 billion years old. Previous estimates suggest the star is 12.
Gravity essentially warps and magnifies the light of distant background galaxies. In this case, the cluster of galaxies intensified the light of Earendel thousands of times. Massive stars such as Earendel typically have companion stars, and while astronomers didn’t expect to be able to spot one, the colors detected by Webb suggest the potential presence of a cool, red companion star.
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