After investigating various methods used by scientists to detect black holes, including gravitational wave detection and observation of accretion disks, I have learned that the process of a star forming a black hole begins with the collapse of a massive star.

This collapse causes an intense gravitational field that compresses the star's core.

If the mass of the core is greater than three times the mass of the sun, the gravitational force becomes so strong that it overcomes the resistance of the neutrons and protons in the matter.

This causes the core to collapse to a point of infinite density, known as a singularity, and creates a black hole.

Scientists detect black holes through various methods, including gravitational wave detection, observation of accretion disks, and direct imaging.

Gravitational wave detectors, such as LIGO and Virgo, measure the ripples in spacetime caused by the collision of two black holes.

Observation of accretion disks, which form around black holes as they pull in surrounding matter, can reveal the presence and properties of the black hole.

Direct imaging using telescopes can also reveal the presence of a black hole by observing the way it bends and distorts light around it.
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