What happens immediately when a massive star ceases to fuse iron in its core?

Answer

It is the immediate prelude to cosmic annihilation

The moment fusion stops in the iron core, the outward thermal pressure vanishes instantly, allowing gravity to gain absolute dominion, initiating immediate collapse.

What happens immediately when a massive star ceases to fuse iron in its core?

#Videos

Can You Kill A Star With Iron? Why Iron Isn't Poison to Stars - YouTube

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