The supernova (SN 2023ixf) was formed when a star, much more massive than our own sun, ran out of fuel to burn in its core. Since the core could not support the mass of the star any more, the star collapsed on itself and created a gigantic explosion. This particular super nova is 21 million light years away. So this star began it's death implosion 21 million years ago... The arrow in my picture points to SN 2023ixf which is near the M101 Pinwheel galaxy.
That's so cool!
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