NASA’s Webb Telescope Locates Former Star That Exploded as Supernova

Summary
Webb shows star was surrounded by a vast shell of carbon-rich dust.
What types of stars explode as supernovas? Usually, we have to try to answer that question after the fact. Astronomers will study the composition and amount of gas expelled in the explosion to gain clues about the former star. But on rare occasions, astronomers are able to identify the specific star that exploded in pre-supernova images of the same region of the sky.
For the first time, astronomers have used images from the James Webb Space Telescope to identify a supernova progenitor that could not be seen by any other telescope: a red supergiant that was located in a nearby galaxy. The supergiant’s surroundings were surprisingly dusty – dusty enough to render it invisible to the Hubble Space Telescope.
Full Article
Forty million years ago, a star in a nearby galaxy exploded, spewing material across space and generating a brilliant beacon of light. That light traveled across the cosmos, reaching Earth June 29, 2025, where it was detected by the All-Sky Automated Survey for Supernovae. Astronomers immediately turned their resources to this new supernova, designated 2025pht, to learn more about it. But one team of scientists instead turned to archives, seeking to use pre-supernova images to identify exactly which star among many had exploded. And they succeeded. Images of galaxy NGC 1637 taken by NASA’s ...Visit NASA Science to view the full news release including article text and associated Webb imagery, graphics, scientific visualizations, videos, captions, text descriptions, and other information.
News releases highlighting the discoveries of NASA’s James Webb Space Telescope are produced for NASA by the Space Telescope Science Institute (STScI) in Baltimore, Maryland, under NASA Contract NAS5-03127. News release content is developed by the News Team in STScI’s Office of Public Outreach.
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