Question

A black hole against a form as an aging star abruptly collapses when it seizes admitting radiation from fusion reactions

Answers

GPT-4o mini
The process you’re describing relates to the lifecycle of massive stars and the formation of black holes. As a massive star ages, it undergoes various stages of nuclear fusion, progressively fusing lighter elements into heavier ones in its core. Initially, hydrogen is fused into helium, and as the hydrogen supply depletes, the core contracts and temperatures rise, allowing for the fusion of helium into heavier elements like carbon and oxygen. This process continues with the star creating elements up to iron in a series of fusion reactions.

When a massive star (typically more than about 20 times the mass of the Sun) runs out of fuel for fusion reactions, it can no longer support itself against gravitational collapse. The core becomes increasingly unstable, and once it reaches a certain point where it can no longer sustain nuclear reactions, it collapses under its own gravity. During this collapse, the outer layers of the star may be expelled in a supernova explosion.

If the remaining mass of the core after the supernova is above a certain threshold (the Tolman-Oppenheimer-Volkoff limit, about 2-3 solar masses), it can continue collapsing under gravity, leading to the formation of a black hole. The black hole forms when the core's density and gravitational pull become so great that not even light can escape its grasp, defining the boundary known as the event horizon.

In summary, the aging star collapses due to the cessation of fusion reactions, leading to a sequence of events that can ultimately result in the formation of a black hole.

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