Sagittarius A* (SgrA*) : Black Hole at Centre of Milky Way
Scientists from the Event Horizon Telescope (EHT) facility revealed the first image of the black hole at the centre of the Milky Way.
- The image of Sagittarius A* (SgrA*) gave further support to the idea that the compact object at the centre of our galaxy is indeed a black hole, strengthening Einstein’s general theory of relativity.
- In 2019, the Event Horizon Telescope facility, a collaboration of over 300 researchers, made history by releasing the first-ever image of a black hole, M87* — the black hole at the centre of a galaxy Messier 87, which is a supergiant elliptic galaxy.
- The ring-shaped image of SgrA*, which looked a lot similar to the one of M87*, occupied 52 microarcseconds in the field of view, which is as big a span of our view as a doughnut on the moon.
- The whole exercise was possible because of the enormous power of the Event Horizon Telescope, an ensemble of several telescopes around the world, which together were like a giant eye on the earth with a sight that is 3 million times sharper than the human eye.
- Sagittarius A* is 27,000 light years from us.