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Milky Way’s supermassive black hole exploded 3.5 million years ago: Study

  • February 28, 2022
  • Posted by: OptimizeIAS Team
  • Category: DPN Topics
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Milky Way’s supermassive black hole exploded 3.5 million years ago: Study

TOPIC: Science & Tech

Context- The black hole, known as Sagittarius A, or Sgr A* (pronounced Sagittarius A-star) — about 4.2 million times more massive than the Sun — exploded due to nuclear activity, according to a team of scientists at Australia’s ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3-D).

Concept-

About Sagittarius A:

  • It is at the center of the Milky Way galaxy which has four million times the mass of the sun.
  • A supermassive black hole that sits 26,000 light-years away from Earth, near the Galactic Center, or the center of the Milky Way.
  • It is one of the few black holes where we can witness the flow of matter nearby.

About Black Holes:

  • Black holes are extraordinarily dense objects possessing gravitational pulls so powerful even light cannot escape them.
  • It refers to a point in space where the matter is so compressed as to create a gravity field from which even light cannot escape.
  • The concept was theorized by Albert Einstein in 1915 and the term ‘black hole’ was coined in the mid-1960s by American physicist John Archibald Wheeler.
  • The black holes belong to two categories:
    • One category ranges between a few solar masses and tens of solar masses. These are thought to form when massive stars die.
    • The other category is of supermassive black holes. These range from hundreds of thousands to billions of times that of the sun from the Solar system to which Earth belongs.
Milky Way’s supermassive black hole exploded 3.5 million years ago: Study Science and tech

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