The theoretical end-product of the gravitational collapse of a massive star is known as a black hole. In astrophysics, a black hole is a region in space where gravity is extremely strong, causing space-time to be curved to such an extent that nothing, not even light, can escape its gravitational pull.

Black holes are formed when massive stars exhaust their nuclear fuel and can no longer sustain the outward pressure generated by the fusion reactions in their cores. At this point, the core collapses under its own gravitational force, leading to an intense concentration of matter in a tiny volume.

As the collapse progresses, the gravitational pull becomes so strong that it traps even light within a boundary called the event horizon. The event horizon is the point of no return, beyond which nothing can escape the black hole's gravitational grip. It is this property that gives black holes their name, as they appear completely black against the background of the universe.

The collapse of a massive star into a black hole releases an enormous amount of energy in the form of a supernova explosion. The outer layers of the star are ejected into space, while the core collapses into a singularity, a point of infinite density and zero volume. The singularity is surrounded by the event horizon, which marks the boundary of the black hole.

Black holes have fascinated scientists and astronomers for decades, as they challenge our understanding of the laws of physics. They provide a unique opportunity to study the extreme conditions of gravity and the nature of space-time in its most extreme form.

In conclusion, the name for the theoretical end-product of the gravitational collapse of a massive star is a black hole. These enigmatic objects are formed when the core of a massive star collapses under its own gravity, creating a region of space where even light cannot escape. Black holes continue to captivate the scientific community, offering valuable insights into the mysteries of the universe.

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