The surface of a black hole is called the event horizon. The center of a black hole is known as the singularity. Stars having a mass more than 1.4 solar masses but less than 3 solar masses become neutron stars. Stars having more than nearly 3 solar masses will become black holes through another astronomical stage. A star having a mass less than 1.4 solar mass becomes a white dwarf. Then the star becomes either a white dwarf or neutron star or black hole depending on its mass. So, the collapsing clouds reached the essential conditions for nuclear fusion reactions, and stars were born.īut, after the fusion fuel of the star is used up, the mass of the star contracts into a very small volume by the gravitational forces of the star as the remaining heat and radiation pressure is not enough to balance its own gravitational forces. Finally, the internal temperature reached about 7K, and the density of such a cloud was extremely high. The temperature continuously increased as the clouds were contracting. So, the kinetic energy of particles increased. As the gravitational forces attracted the matter in the clouds together, particles came closer and closer. As the universe cooled down, the gravitational forces could bring some of these particles together, and giant gaseous clouds were formed. These were floating throughout the universe just like a gas. So, one should have a clear understanding of the origin of stars in order to understand the formation of black holes.Īfter the Big Bang, the matter was almost in the form of protons, electrons and some other light nuclei. Black holes, White dwarfs, and neutron stars are some possible results of a collapsing star. Stars are huge natural thermonuclear power plants in the universe. This the main difference between black hole and wormhole. Anyhow, they only exist in theoretical physics, to date. A wormhole connects two points in space-time or two different universes. A wormhole is a theoretical concept suggested by Einstein and Rosen. Finally, physicists were lucky to confirm the existence of black holes after they could detect gravitational waves for the first time, on 14 September 2015. The concept of black holes are suggested in the theory of general relativity, and it was a theoretical concept for decades. So, they create extremely strong gravitational fields that distort the space-time around it. A black hole is an extremely dense object with a large amount of matter and energy. Wormholesīlack holes and wormholes are two fascinating topics in physics and also in scientific fictions.
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