James Webb telescope spotted the earliest known ‘quenched’ galaxy
Science News reports: The James Webb Space Telescope has spotted the earliest known galaxy to abruptly stop forming stars. The galaxy, called GS-9209, quenched its star formation more than 12.5 billion years ago, researchers report January 26 at arXiv.org. That’s only a little more than a billion years after the Big Bang. Its existence reveals new details about how galaxies live and die across cosmic time. “It’s a remarkable discovery,” says astronomer Mauro Giavalisco of the University of Massachusetts Amherst,…