As a star runs out of fuel and its core collapses, it creates a massive gravitational force that can cause the star to explode in a supernova. If the remaining core of the star is massive enough, it will continue to collapse under its own weight and form a black hole. This collapse creates a singularity, a point of infinite density where the laws of physics as we know them break down.

Scientists can detect black holes in a variety of ways. One method is through observing their effect on nearby matter. As matter falls into a black hole, it heats up and emits radiation, such as X-rays, that can be detected by telescopes. Another method is through gravitational lensing, where the immense gravity of a black hole bends and distorts the path of light passing by it.

In addition, scientists can also detect black holes by observing the motion of nearby stars. As a black hole orbits around a star, the star will move in response to the black hole's gravity. This motion can be detected and used to infer the presence of a black hole.

Overall, the formation of black holes from collapsed stars and the detection of these enigmatic objects by scientists are fascinating topics that continue to be studied and explored.
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