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Star will zip by the Milky Way's supermassive black hole at nearly 3% the speed of light
Posted on 2/28/18 at 8:29 pm
Posted on 2/28/18 at 8:29 pm
LINK
At the center of the Milky Way galaxy, some 26,000 light-years away, lies a supermassive black hole known as Sagittarius A*. With a mass of roughly 4 million Suns, this colossal cosmic object is a gravitational heavyweight. When something, such as a star, passes by the black hole's outer rim, its enormous gravitational pull accelerates the star to speeds of up to 18.5 million miles (30 million kilometers) per hour – or about three percent the speed of light. The short list of high-velocity stars that make such close approaches to Sagittarius A* are known as S-stars.
..
S0-2 is an important star for testing gravitational redshift because it makes the closest known approach to Sagittarius A*, reaching a distance of just 17 light-hours, or three times the distance between the Sun and Pluto. This means that S0-2 should feel a noticeable nudge in its orbit due the extreme gravitational forces it will experience during its closest pass by Sagittarius A* since its last (16 years ago). Although astronomers knew about S0-2 when it made its last close pass, at the time, they did not have instruments precise enough to definitively observe a gravitational redshift in its starlight. Now they do.
At the center of the Milky Way galaxy, some 26,000 light-years away, lies a supermassive black hole known as Sagittarius A*. With a mass of roughly 4 million Suns, this colossal cosmic object is a gravitational heavyweight. When something, such as a star, passes by the black hole's outer rim, its enormous gravitational pull accelerates the star to speeds of up to 18.5 million miles (30 million kilometers) per hour – or about three percent the speed of light. The short list of high-velocity stars that make such close approaches to Sagittarius A* are known as S-stars.
..
S0-2 is an important star for testing gravitational redshift because it makes the closest known approach to Sagittarius A*, reaching a distance of just 17 light-hours, or three times the distance between the Sun and Pluto. This means that S0-2 should feel a noticeable nudge in its orbit due the extreme gravitational forces it will experience during its closest pass by Sagittarius A* since its last (16 years ago). Although astronomers knew about S0-2 when it made its last close pass, at the time, they did not have instruments precise enough to definitively observe a gravitational redshift in its starlight. Now they do.
Posted on 2/28/18 at 8:32 pm to DavidTheGnome
Sagittarius A*
Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation Sgr A*) is a bright and very compact astronomical radio source at the center of the Milky Way, near the border of the constellations Sagittarius and Scorpius. It is part of a larger astronomical feature known as Sagittarius A. Sagittarius A* is thought to be the location of a supermassive black hole,[6][7][8] like those that are now generally accepted to be at the centers of most spiral and elliptical galaxies. Observations of the star S2 in orbit around Sagittarius A* have been used to show the presence of, and produce data about, the Milky Way's central supermassive black hole, and have led to the conclusion that Sagittarius A* is the site of that black hole.[9]
Sagittarius A* (pronounced "Sagittarius A-star", standard abbreviation Sgr A*) is a bright and very compact astronomical radio source at the center of the Milky Way, near the border of the constellations Sagittarius and Scorpius. It is part of a larger astronomical feature known as Sagittarius A. Sagittarius A* is thought to be the location of a supermassive black hole,[6][7][8] like those that are now generally accepted to be at the centers of most spiral and elliptical galaxies. Observations of the star S2 in orbit around Sagittarius A* have been used to show the presence of, and produce data about, the Milky Way's central supermassive black hole, and have led to the conclusion that Sagittarius A* is the site of that black hole.[9]
Posted on 2/28/18 at 8:32 pm to DavidTheGnome
I have read all kinds of shite on black and white holes. The concept is still difficult to grasp.
Posted on 2/28/18 at 8:33 pm to DavidTheGnome
Invisible to telescopic eye S2 the star that would not die.
This post was edited on 2/28/18 at 8:34 pm
Posted on 2/28/18 at 8:34 pm to DavidTheGnome
quote:
Sagittarius A* (pronounced "Sagittarius A-star"
Mind blown.
This post was edited on 2/28/18 at 8:35 pm
Posted on 2/28/18 at 8:34 pm to DavidTheGnome
I’ve seen better red shifts in the quad on a Tuesday night
Posted on 2/28/18 at 8:34 pm to DavidTheGnome
Reading stuff like that really makes me feel stupid. I just can't grasp what the hell all that means. It really makes me feel like a fricking retard.
Posted on 2/28/18 at 8:35 pm to AUCE05
quote:
I have read all kinds of shite on black and white holes. The concept is still difficult to grasp.
It's not that difficult. One has good schools and the other has shite schools.
Posted on 2/28/18 at 8:36 pm to supadave3
3% of the speed of light is really hauling arse
When something, such as a star, passes by the black hole's outer rim, its enormous gravitational pull accelerates the star to speeds of up to 18.5 million miles (30 million kilometers) per hour – or about three percent the speed of light.
When something, such as a star, passes by the black hole's outer rim, its enormous gravitational pull accelerates the star to speeds of up to 18.5 million miles (30 million kilometers) per hour – or about three percent the speed of light.
Posted on 2/28/18 at 8:38 pm to DavidTheGnome
quote:
supermassive black hole
There is a joke somewhere with this
Posted on 2/28/18 at 8:40 pm to Chuker
The test is whether the stars orbit will be slightly altered by the black holes gravity. If so it further proves Einstein’s theory of gravity.
Posted on 2/28/18 at 8:42 pm to DavidTheGnome
How the frick do they figure shite out like that?
Posted on 2/28/18 at 8:44 pm to DanglingFury
Different kinds of telescopes observe the stars orbit over time and can tell they are all orbiting something with extremely powerful gravity but can’t be seen. Physics and math determines that is a black hole.
This post was edited on 2/28/18 at 8:45 pm
Posted on 2/28/18 at 8:50 pm to AUCE05
quote:
white holes
My favorite kind.
Posted on 2/28/18 at 8:53 pm to DavidTheGnome
quote:
3% the speed of light
Pretty impressive but my dumps on a Sunday morning move faster
Posted on 2/28/18 at 8:57 pm to DavidTheGnome
Damn, Gnome, I wanted to make a stupid joke about supermassive black holes and bars and beer, but I read all the stuff you posted....
Pretty awesome man...thanks! Kind of puts a lot of things in perspective....
Hats off to you and for this thread!!
Pretty awesome man...thanks! Kind of puts a lot of things in perspective....
Hats off to you and for this thread!!
This post was edited on 2/28/18 at 8:58 pm
Posted on 2/28/18 at 8:57 pm to DavidTheGnome
Old news. Happened 26,000 years ago.
This post was edited on 2/28/18 at 8:58 pm
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