An amateur astronomer testing a new camera happens to catch a supernova as it's being born

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By studying the light coming from this celestial apparition, the researchers found that it was a Type IIb supernova, one that may have come from a weird class of stars known as yellow supergiants. That was a little surprising, Bersten explained, because when a solo star goes supernova it’s more often something like a red supergiant (a cooler, inflated star) or a more blue-toned variable star (a hotter, denser star).

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