What process immediately precedes the violent core collapse in a red supergiant supernova?

Answer

Formation of an iron core that stops energy generation.

When a massive star fuses elements up to iron in its core, fusion stops because fusing iron consumes energy, causing the thermal pressure support to vanish.

What process immediately precedes the violent core collapse in a red supergiant supernova?

#Videos

Why Do Some Red Giant Stars Explode As Supernovae? - YouTube

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