Scientists have captured images of a black hole at the center of our galaxy

Scientists from the EHT (Event Horizon Telescope), a global network of radio telescopes and observatories, have managed to capture the most intelligent images taken by a black hole in the Milky Way. Way, the galaxy where the Solar System is and, therefore, us. planet exists.

The announcement of the image of Sagittarius A *, as the black hole has been named, was made this Thursday (12) at an international event with scientists from EHT and ESO (European Southern Observatory).

When looking at the picture, people who do not follow astronomy may find it strange, because it is a bit blurred. This is because this “picture” is the result of thousands of captures being made, including differences in the movement of the black hole and the change in brightness.

In front, the black holes are very thick areas with strong forces that do not affect them. Something that scientists have always thought of is the study of the “event horizon” or the non-return direction, which makes the area between the center and the inside of the hole – a once something enters that, it can not run further.

Image of the ALMA observatory, located in the Atacama Desert (Chile), with a view of the Sagittarius A * black hole - José Francisco Salgado / ESO and EHT - José Francisco Salgado / ESO and EHT

Image of the ALMA observatory, in the Atacama Desert (Chile), with the perspective of the Sagittarius A * black hole

Photo: José Francisco Salgado / ESO and EHT

What is attractive in Sagittarius A * is in fact its similarity to Earth. When the black hole M87 discovered in 2019 (its image went viral at the time) was 50 million light-years from Earth, one of the current announcements is only 25,000 light-years.

Do not say Sagittarius A * less than M87 *. One of our “first gardens” is 4 million times the sun, while the second is nearly 7 billion times its size. Its low resolution is one of the problems for capturing its image, which has brought together several telescopes around the world.

On the left, the picture of the black hole M87 * found in 2019, and on the right, Sagittarius A *, which is in the middle of our galaxy - EHT - EHT

On the left, the image of the black hole M87 * seen in 2019, and on the right, Sagittarius A *, which is in the middle of our galaxy

Image: EHT

As the black holes do not emit light, the major challenge in having the image of them is the “silhouette” caused by the collision of light in gravity. As a result, the only way to get a “picture” of them is to use a microwave spectrum, combining the energy of different monitors.

Despite the similarity of the blacks, they have many differences.  In the representation of ESO, you can see a comparison image of them and their distance of light years - Playback / YouTube / ESO - Playback / YouTube / ESO

Despite the similarity of the blacks, they have many differences. In the representation of ESO, it is possible to see comparative images of them and indicate their distances in light years.

Image: Playback / YouTube / ESO

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