According to slashgear, black holes are born when a star 20 times the mass of the sun exhausts its nuclear fuel and collapses under gravity. NASA explained that when this happens, it triggers a supernova, one of the brightest explosions in our universe. According to a 2022 study, there are 40 billion black holes in the observable universe. Black holes whose mass is "three to dozens" times that of the sun are called stellar black holes. On the other hand, the mass of supermassive black holes can be 100000 to billions of times that of our sun. There is a supermassive black hole at the center of most large galaxies.
Black holes are undoubtedly the most mysterious astrophysical phenomenon in the universe. According to the print report, the famous physicist Albert Einstein predicted the existence of black holes. The mathematics and physics of Einstein's general theory of relativity proved that black holes should exist. Today, NASA and the world's best top talent are still confused about black holes. Some black holes are extremely old and formed in the early stages of the universe. Some black holes even contradict their established destructive reputation and give birth to stars. But no black hole event is as confusing and unimaginable as what happens in space and time inside these celestial bodies.
In a black hole, once the event horizon is crossed, things will become very strange, because space and time will shift position and extend to infinity, as Einstein explained. This is the most difficult concept to visualize. First of all, we must understand that the gravity of a black hole is so strong that once anything enters its range, it cannot escape its pull, not even light. In space, objects are always moving. They move in space and time and are constrained by the law of inertia, Newton's first law. The law states that an object will continue to move until an external force forces it to change its state of motion. But what happens when an object, such as a moving star, is pulled by a black hole? When will the star stop moving?
When the star moving freely in space and time crossed the event horizon, an important thing happened: its motion law in space and time changed. Now, the star can only move to the "center" or singularity of the black hole; It cannot escape. But what happens when the star reaches the singularity? Will it stop moving? The model says stars will continue to move infinitely in a plane where space and time change position and space is infinitely stretched. This is why black holes can "devour" huge objects, making these large objects suitable for a small area in the black hole.