Uploaded May 2021 | Updated September 2026, 2 hours ago
Black holes are some of the strangest and most fascinating objects in existence. They are extremely dense with such immense gravitational attraction that not even light, which is the fastest entity in our universe, can escape their grasp. This means we cannot really see a black hole since no light can be reflected off its surface. So, how did we first discover them? And how do these mysterious objects even form? Let’s explore some of these mysteries behind black holes!
Albert Einstein was the first to predict the existence of black holes in 1916, with his general theory of relativity. The term "black hole" was coined many years later in 1967 by American astronomer John Wheeler. After decades of being known only as theoretical objects, the first physical black hole ever discovered was spotted in 1971 by astronomers who were studying the constellation Cygnus. But we cannot directly observe black holes since they are invisible due to no light being reflected off their surfaces. So, scientists study them by observing their effect on nearby matter. For example, black holes emit radiation when gas and dust are drawn towards them forming accretion disks. Or quasars which are bright jets of particles blasting off of supermassive black holes.
Black holes are some of the strangest and most fascinating objects in existence. They are extremely dense with such immense gravitational attraction that not even light, which is the fastest entity in our universe, can escape their grasp. This means we cannot really see a black hole since no light can be reflected off its surface. So, how did we first discover them? And how do these mysterious objects even form? Let’s explore some of these mysteries behind black holes!
Albert Einstein was the first to predict the existence of black holes in 1916, with his general theory of relativity. The term "black hole" was coined many years later in 1967 by American astronomer John Wheeler. After decades of being known only as theoretical objects, the first physical black hole ever discovered was spotted in 1971 by astronomers who were studying the constellation Cygnus. But we cannot directly observe black holes since they are invisible due to no light being reflected off their surfaces. So, scientists study them by observing their effect on nearby matter. For example, black holes emit radiation when gas and dust are drawn towards them forming accretion disks. Or quasars which are bright jets of particles blasting off of supermassive black holes.
