Astronomers reveal first image of black hole at the heart of our Milky Way galaxy
Berlin, May 12: Astronomers on Thursday unveiled the first image of the supermassive black hole at the centre of our own Milky Way galaxy.
The finding, published in The Astrophysical Journal Letters, provides overwhelming evidence that the object is indeed a black hole and yields valuable clues about the workings of such giants, which are thought to reside at the centre of most galaxies.
The image was produced by a global research team called the Event Horizon Telescope (EHT) Collaboration, using observations from a worldwide network of radio telescopes.
The finding was unveiled during simultaneous press conferences around the world, including at the European Southern Observatory (ESO) headquarters in Germany.
The image is a long-anticipated look at the massive object that sits at the very centre of our galaxy. Scientists had previously seen stars orbiting around something invisible, compact, and very massive at the centre of the Milky Way.
This strongly suggested that this object known as Sagittarius A* (Sgr A* ) is a black hole, and the image provides the first direct visual evidence of it.
Although we cannot see the black hole itself, because it is completely dark, glowing gas around it reveals a tell-tale signature: a dark central region (called a shadow) surrounded by a bright ring-like structure, the researchers said.
The new view captures light bent by the powerful gravity of the black hole, which is four million times more massive than our Sun, they said.
We were stunned by how well the size of the ring agreed with predictions from Einstein's Theory of General Relativity," said EHT Project Scientist Geoffrey Bower from the Institute of Astronomy and Astrophysics, Academia Sinica, Taipei.
"These unprecedented observations have greatly improved our understanding of what happens at the very centre of our galaxy, and offer new insights on how these giant black holes interact with their surroundings," Bower said.
Because the black hole is about 27 000 light-years away from Earth, it appears to us to have about the same size in the sky as a doughnut on the Moon.
To image it, the team created the powerful EHT, which linked together eight existing radio observatories across the planet to form a single Earth-sized virtual telescope.
The EHT observed Sgr A* on multiple nights in 2017, collecting data for many hours in a row, similar to using a long exposure time on a camera.
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Will Champai Soren become a game-changer for BJP in Jharkhand polls?
Ranchi: Champai Soren, a prominent figure in Jharkhand’s statehood movement, is contesting the 2024 assembly elections from Seraikela, a seat he has consistently held since 1991.
However, there is a surprising shift in his political journey this year. Having resigned from the Jharkhand Mukti Morcha (JMM) earlier this year, Soren is now representing the BJP, a move that could significantly impact the electoral dynamics in the state.
Soren’s switiching is seen as a strategic benefit for the saffron party, which has been working to expand its appeal among Jharkhand’s tribal communities, a demographic traditionally aligned with the JMM. His departure from the JMM, led by Shibu Soren and his son Hemant Soren, was fueled by dissatisfaction with the state government’s policies, which he claimed had failed to address tribal concerns.
Also known as "Jharkhand’s Tiger" for his instrumental role in the statehood movement of the 1990s, Champai Soren has respect and influence among tribal voters. His decision to switch the party could be a turning point in the BJP’s efforts to gain a stronger hold in a state where tribal votes often decide the outcome.
