Black hole image: Astronomers reveal 1st picture of Sagittarius A at center of Milky Way Galaxy – Fresno, California

Fresno, California 2022-05-13 12:47:48 –

Washington-The world’s first image of a chaotic supermassive black hole in the heart of our Milky Way galaxy does not portray a greedy space destroyer, but on Thursday astronomers “calm” with a near-hunger meal. It depicts what was called “a giant”.

Astronomers believe that almost every galaxy, including ours, has these huge black holes in a lively and crowded center where light and matter cannot escape, and we get images of them. Is very difficult. When light is sucked into the abyss with overheated gas and dust, it bends and twists due to gravity.

The color images released Thursday are from the International Consortium behind the Event Horizontal Telescope, a collection of eight synchronized radio telescopes around the world. Getting a good image was a challenge. Earlier efforts have found black holes too scared.

“When we saw it, it was rumbling,” said Feryal Ozel of the University of Arizona.

See: NASA Scientists Talk About Supermassive Black Holes

She described it as a “gentle giant” while announcing a breakthrough with other astronomers involved in the project. This picture also supports Albert Einstein’s general theory of relativity. Black holes are exactly the size indicated by Einstein’s equations. It is the size of Mercury’s orbit around our Sun.

Black holes devour galaxy matter, but Ozel said it “little eats.” According to another astronomer, this is the equivalent of a person who eats a grain of rice for millions of years.

“Photographs of black holes are the hardest to think of,” said Andrea Ghez, an astronomer at the University of California, Los Angeles. She wasn’t part of her telescope team, but she won the Nobel Prize in the 1990s for her discovery of the Milky Way black hole.

She said the image of “my baby” is exactly what it should be-an eerie looking orange-red ring with full black in the middle.

Scientists expected the Milky Way black hole to be more violent, especially since the only other image from another galaxy is much larger and shows a more active black hole.

more: Astronomers discover light from behind a black hole for the first time

“It’s a timid lion in a black hole,” said Jeffrey C. Bauer, a project scientist at the Institute of Astrophysics in Taiwan’s Academic Astrophysics Institute.

Black holes are “starved”, so there is little material to fall into the center, which allows astronomers to look deeper, Bauer said.

The Milky Way black hole is called Sagittarius A (with an asterisk representing a star). It is close to the boundary between Sagittarius and Scorpio, and is 4 million times larger than the Sun. Bauer said it’s probably more typical of what’s in the center of most galaxies, “just sitting there and doing almost nothing.”

It’s incredibly hot and trillions of degrees, Ozel said.

The same telescope group released the first black hole image in 2019. This image is from a galaxy 53 million light-years away and is 1,500 times larger than our galaxy. The Milky Way black hole is much closer, about 27,000 light-years away. Light-years are 5.9 trillion miles (9.5 trillion kilometers).

Vincent Fish, an astronomer at the Massachusetts Institute of Technology, needed to coordinate the eight telescopes very closely “in a process similar to shaking hands with everyone in the room” to take pictures.

Astronomers used the data collected in 2017 to obtain new images. The next step is one of these two black holes, perhaps both movies, Fish said.

The project costs about $ 60 million, and $ 28 million comes from the National Science Foundation.

It’s quieter than expected, but Ghez said the center of the Milky Way is an important place to study.

It’s “everything is more extreme, like downtown in the city. It’s crowded. Things move faster,” Ghez said in an interview. “We live in the suburbs (in the spiral arms of the galaxy). Things are calm here.”


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