![]() April 2019: The scientists at the Event Horizon Telescope project released the first-ever image of a black hole.In simpler words, quasar and blazer are the same things but are pointed at different angles. At times the AGN shoots out jets of matter at the speed of light from its center called ‘quasar’.Īnd when a galaxy is oriented such that these jets shoot towards the direction of the earth, it’s called ‘blazar’. This process makes the centres of the galaxies very bright and is called Active Galactic Nuclei (AGN). Its gravitational energy can be converted into light. ![]() Sometimes these supermassive black holes collect disk of gas, dust, and stellar debris around it- when they fall into the black hole. Supermassive black holes:Īt the centre of most galaxies including our milky way, there is a supermassive black hole. These x-rays are detected and the radio images define our idea of the black hole. Since any matter flowing into the black hole becomes intensely heated, it radiates x-rays before entering the event horizon and disappearing forever. These range from hundreds of thousands to billions of times that of the sun from the Solar system to which Earth belongs.Ī black hole cannot be observed but only detected by the effects of its enormous gravitational fields on nearby matter. The other is supermassive black holes.These are thought to form when massive stars die. One ranges between a few solar masses and tens of solar masses.The black holes belong to two categories: The concept was given by Albert Einstein in 1915 but the term ‘black hole’ was coined in the 1960s by American physicist John Archibald Wheeler. This huge weight of its constituent matter falling in compresses the dying star to a point of zero volume and infinite density- called the singularity. ![]() Then its gravity caused the core to collapse upon itself. When a massive star (more than 8 times bigger than Sun) runs out of its thermonuclear fuel in its core- signifies the end of its life and the core becomes unstable. This point of no return is called the event horizon. The bigger they are, the larger a zone of “no return” they have, where anything entering their territory is irrevocably lost to the black hole. ![]()
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