: Not all black holes are black – and we have found thousands of the brightest ones #IndiaNEWS When the most massive stars die, they collapse to form some of the densest objects known in the universe:

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Not all black holes are black – and we have found thousands of the brightest ones #IndiaNEWS
When the most massive stars die, they collapse to form some of the densest objects known in the universe: black holes. They are the “darkest� objects in the cosmos, as not even light can escape their incredibly strong gravity.Because of this, it is impossible to directly image black holes, making them mysterious and quite perplexing. But our new research has road-tested a way to spot some of the most voracious black holes of all, making it easier to find them buried deep in the hearts of distant galaxies.Despite the name, not all black holes are black. While black holes come in many different sizes, the biggest ones are at the centres of galaxies and are still growing in size.These “supermassive� black holes can have a mass of up to a billion Suns. The black hole at the centre of our own Milky Way galaxy – called Sagittarius A*, whose discovery received the 2020 Nobel Prize in Physics – is fairly calm. But that is not the case for all supermassive black holes.If materials such as gas, dust or stars get too close to a black hole, it gets sucked in by the enormous gravitational force. As it falls towards the black hole, it heats up and becomes incredibly bright.The light produced...Read more

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