Black hole at the center of our Galaxy imaged for the first time

The second-ever direct image of a black hole — Sagittarius A*, at the centre of the Milky Way.Credit: Event Horizon Telescope collaboration

The Event Horizon Telescope network has captured the second-ever direct image of a black hole — called Sagittarius A* — at the center of the Milky Way.

Radio astronomers have imaged the super massive black hole at the centre of the Milky Way. It is only the second-ever direct image of a black hole, after the same team unveiled a historic picture of a more distant black hole in 2019.

The long-awaited results, presented today by the Event Horizon Telescope (EHT) collaboration, show an image reminiscent of the earlier one, with a ring of radiation surrounding a darker disk of precisely the size that was predicted from indirect observations and from Albert Einstein’s theory of gravity.

“Today, right this moment, we have direct evidence that this object is a black hole,” said astrophysicist Sara Issaoun of the Harvard Smithsonian Center for Astrophysics at a press conference in Garching, Germany.

“We’ve been working on this for so long, every once and a while you have to pinch yourself and remember that this is the black hole at the centre of our Universe,” said computational-imaging researcher and former EHT team member Katie Bouman at a press conference in Washington, DC. “I mean, what’s more cool than seeing the black hole at the centre of the Milky Way?”

Black-hole observations …

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Astronomy Picture of the Day

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2015 July 7

 The Milky Way from a Malibu Sea Cave
Image Credit & Copyright: Jack Fusco

 
Explanation: What’s happening outside this cave? Nothing unexpected – it’s just the central band of our Milky Way Galaxy passing by. As the Earth turns, the band of our Galaxy appears to rotate and shift along the horizon. The featured image was taken by a photographer who professes a passion for locating sea caves, and who found this spectacular grotto in Leo Carrillo State Park near Malibu, California, USA. After some planning, he timed this single shot image through the 10-meter high cave entrance to show the Milky Way far in the distance. In the foreground, several rocks about one meter across are visible. Visible in the background starscape are millions of stars including the relatively bright and orange Antares, situated just to the right of the image center.