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How Are Black Holes Formed?

A black hole is a region in space where the pull of gravity is so strong that if an elephant tried to escape, it couldn’t.
Actually, nothing, not even light, can escape from a black hole
On this journey through the Universe to find out more about Black Holes. You will learn how a black hole is formed, how many types of black holes we can observe, and finally, we will give you a list of three of the most massive black holes in the Universe.
Ok, let’s go! Because we are getting antsy!
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A black hole’s “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos. Matter and radiation fall in, but they can’t get out. 
Two main classes of black holes have been extensively observed. Stellar-mass black holes with three to dozens of times the Sun’s mass are spread throughout our Milky Way galaxy, while supermassive monsters weighing 100,000 to billions of solar masses are found in the centres of most big galaxies.
Don’t worry: we will never fall into a black hole, chances are very low.
Anything that passes the event horizon, the point at which escape becomes impossible, is in theory destined for spaghettification thanks to a sharp increase in the strength of gravity as you fall into the black hole…in fact, black holes’ fav plate is SPAGHETTI
The Milky Way hosts its own supermassive black hole at its centre known as Sagittarius A* that is more than four million times as massive as our sun.
Now let me ask you a question: Will the Sun become a black hole? 
So what will happen to it? In some 6 billion years it will end up as a white dwarf — a small, dense remnant of a star that glows from leftover heat. The process will start about 5 billion years from now when the Sun begins to run out of fuel.
TON 618
TON 618, which is more accurately classed as a Quasar, is an extremely luminous jet of light at the centre of a distant galaxy.
Holmberg 15A 
This newly-discovered ultramassive black hole resides in Holmberg 15A, a supergiant elliptical galaxy located in the centre of a group of over 500 galaxies called Abell 85. 
IC 1101
We know that it might be a black hole at the centre of IC 1101 galaxy.
This Supermassive Black Hole is estimated to have a mass of 40 to 100 billion times the mass of the Sun. 
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Credits: Ron Miller
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