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How old is Sgr A?

May 26, 2022
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How old is Sgr A?
How old is Sgr A?

Why is Sagittarius A called Sagittarius A?

A: The name 'Sagittarius A*' refers to the believed location of the supermassive black hole in the center of our galaxy. About 50 years ago, astronomers identified an area within the constellation of Sagittarius that was the strongest region of radio emission — thus making it the likely center of the Milky Way.

How large is Sagittarius A *?

Based on mass and increasingly precise radius limits, astronomers have concluded that Sagittarius A* must be the Milky Way's central supermassive black hole. The current value of its mass is 4.154±0.014 million solar masses.

Where exactly is Sagittarius A?

the Milky Way Galaxy
Sagittarius A* (Sgr A*), supermassive black hole at the centre of the Milky Way Galaxy, located in the constellation Sagittarius and having a mass equivalent to four million Suns. It is a strong source of radio waves and is embedded in the larger Sagittarius A complex.

When did Sagittarius A * form?

Sgr A East is about 25 light years wide and is believed to have formed after a supernova event that occurred between 35,000 and 100,000 BCE.

How fast is Sagittarius A * spinning?

It is made of several dust and gas clouds, which orbit and fall onto Sagittarius A* at velocities as high as 1,000 kilometers per second.

How long would it take to get to Sagittarius A?

Looking even farther afield, you could reach the closest supermassive black hole — Sagittarius A* at the Milky Way's center — in about 20 years, despite the fact that it's ~27,000 light-years away.

Is Sagittarius A a dormant black hole?

As an example, Sagittarius A*, the black hole at our galaxy's center, is technically dormant right now and has been for over forty years, though it is expected that later on this year, the black hole will become active again, though we aren't sure to what extent.

Will Sagittarius A * destroy the Milky Way?

For now, the image may help perhaps to rehabilitate the public image of black holes. They are often portrayed as cosmic monsters that swallow up everything before them, but Sagittarius A* acts as a kind of gravitational anchor for the Milky Way. “These objects do not only destroy and kill,” Younsi said.


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