A Failed Supernova (IMAGE)
Caption
In the failed supernova of a red supergiant, the envelope of the star is ejected and expands, producing a cold, red transient source surrounding the newly formed black hole, as illustrated by the expanding shell (left to right). Some residual material may fall onto the black hole, as illustrated by the stream and the disk, potentially powering some optical and infrared emissions years after the collapse.
Credit
Credit: NASA, ESA, P. Jeffries (STScI)
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