Astronomers have made a remarkable discovery about the Cassiopeia A supernova remnant, using data from the James Webb Space Telescope (JWST). The remnant, which was created by a massive star that exploded in the year 1680, has been found to contain high levels of oxygen, which could be a sign of a new and unexpected type of stellar treatment. This could provide insight into how stars die and how their explosions shape the universe.

The Cassiopeia A supernova remnant has been studied by astronomers for centuries and continues to be of interest due to its incredible size and intense brightness. Now, using data from the powerful JWST, astronomers have discovered unexpectedly high levels of oxygen in the remnant’s outermost parts. This is the first time that such an abundance of oxygen has been found in a supernova remnant, and it could suggest a new type of stellar treatment.

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source: Phys.org