Black Hole at the Center of Our Galaxy

Black Hole at the Center of Our Galaxy

Is the Black Hole at the Center of Our Galaxy Actually a Wormhole?

Science fiction writers love wormholes because they make the impossible possible, connecting places that would otherwise be inaccessible. You go into a wormhole and it throws you somewhere else; Generally, this is a place suitable for the subject of the story. As improbable as these exotic relatives of black holes may seem, this is precisely why they have attracted the attention of physicists. Some of these physicists have recently pondered what such a structure might look like in real life. They even suggested that one of them could be found in the center of our galaxy.

The surest way to confirm whether a wormhole exists would be to poke a black hole directly to see if the black hole harbors a bridge to another location. But humanity may never find this opportunity. Still, researchers can rule out some of the most obvious scenarios before they leave Earth. If the monstrous black hole that resides in the turbulent center of the Milky Way galaxy is the gateway to another place rather than the endpoint, astronomers may be able to clarify whether something exists on the other side. Black hole researchers have been tracking the orbits of stars like S2 ​​orbiting this galactic hole for years. According to a new calculation, these stars would have to perform a very special dance if they felt the pull of their distant twins beyond the black hole.

“If astronomers can measure S2’s orbit with greater precision and focus on this area and detect that there is such a dance, it’s done,” says Dejan Stojkovic, a theoretical physicist at the University of Buffalo who helped calculate this result. “It’s going to be a big deal.”

Wormholes have a strange shape that is theoretically possible thanks to Einstein’s theory of gravity. But the power required to form such a shape is found only in black holes. One way to check if a particular black hole is warping the fabric of space is to send a rover into the black hole, as in the movie Interstellar. But we would have to wait thousands of years for any spacecraft to reach our nearest candidates.

Also, most physicists agree that sci-fi bridges that people can cross do not exist. According to Einstein’s equations, the only way to combat the natural tendency of these bridges to collapse is to add some kind of thrust that other laws of physics don’t allow on large scales; that is, adding negative energy (physics students will remember that energy always comes out positive, unlike velocity and acceleration). Stojkovic says he and his colleagues have previously described a wormhole operating in our universe, avoiding such “hocus pocus”.

But just because astronauts can’t get through a huge wormhole doesn’t mean nothing can. Working within the framework of Einstein’s theory of gravity, researchers have found a way to create a large and stable wormhole that remains open with the force that causes the expansion of the universe in their previous work. In the new study, which is a continuation of the old one, it is calculated that while most particles and electric fields are not sufficient, the gravitational force easily overcomes this task. So objects on our side could theoretically feel the pull of something very heavy on the other side. “We were kind of surprised, but what else can you expect?” says Stojkovic. “Gravity is a property of spacetime.”

The research, published three years ago in Physical Review D, debates whether astronomers can detect such mild gravitational effects in stars in the Milky Way galaxy.

The ideal target put forward by Stojkovic and his colleagues is Sagittarius (Sag) A., which is said to be at the center of our galaxy. More specifically, the scientists calculated the possible effects that may occur in the S2 star orbiting Sag A. If there is a wormhole inside this black hole, similar stars will likely be orbiting on the other side of the universe, and S2 can feel the gravitational pull of a distant twin through this cosmic connection.

As a result, any deviation in S2 may be slight. But astronomers, observing for more than 20 years, have been able to measure the star’s acceleration to an accuracy of four decimal places. Stojkovic estimates that astronomers will be able to test his wormhole hypothesis with an accuracy of about 100 times higher than that. According to Stojkovic, this benchmark is a level that would naturally be reached with decades of further data collection in existing experiments. If S2’s motion is not at all surprising at that point, then Sag A* must be either an ordinary black hole or a wormhole connecting to a fairly empty stretch of space.

But while Stojkovic and his colleagues analyze large wormholes using Einstein’s equations, other theorists studying the microscopic (but theoretical) properties of space and gravity are not so sure that the results hold at the particle level. According to Harvard University physicist Daniel Jafferis, since no one has suggested a way for large wormholes to form, the strange motions to be detected in S2 will also raise more questions than they offer answers. “Someone must have done the wormhole on purpose,” he says. Moreover, the only thing less likely than a real wormhole could be a real wormhole made by super-advanced aliens.

Moreover, Jafferis says that the realities in particle physics may not agree with the conclusions drawn from Einstein’s equations alone, and that without negative energy “magic”, impassability really means impassability. “Nothing can pass there, including hypothetical gravitational particle gravitons,” says Jafferis. “So the wormhole is apparently undetectable from the outside.”

Stojkovic, who said that he did the calculation only out of his own curiosity, is fully aware of the astronomically impossible things to happen. Still, since astronomers collect data in every situation, it’s not biased and it’s nothing to lose by waiting. “If a wormhole is found, then I see no reason not to believe there is much more,” he says. “When we found the first black hole candidate, we suddenly saw millions.”

Author: Charlie Wood/Popular Science.


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