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The Lives of StarsModule 5How Massive Stars Die
Module 5 / Lesson 18 of 2442 min
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Why Does Fusion Stop Supporting the Star after an Iron Core Appears?

Why does fusing iron no longer provide the energy needed for pressure support?

Use binding energy to explain why the ordinary energy-producing fusion ladder ends near iron.

A scientific artistic cutaway of a dying massive star with hot nested shells surrounding a compact steel-blue iron-rich core.
Vastward scientific artistic reconstruction. The cutaway makes a modelled interior visible for learning; colours, layer thicknesses, and scale are illustrative rather than a direct observation.

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