Two supermassive black holes in a galaxy 1 billion light-years away keep shortening the amount of time it takes for them to rotate around each other. Scientists think that they will join forces in the next three years. Scientists really want to see it, but they don’t know how it will be seen.
The coming together of two very large black holes
Soon, two black holes with a lot of mass will join together. A group of Chinese astronomers who were looking at the galaxy SDSS J1430+2303 told about this. It is a billion light years away from us and has oscillations that are very typical of two huge objects with a combined mass 200 million times that of the Sun spinning around each other.
Scientists think that the way the signals change means that they are quickly coming together. Astronomers say that over the past three years, the time it takes for the two black holes to rotate has gone from about one year to one month. So, it seems likely that these two things will soon become one.
Astronomers may use the word “soon” to refer to times that are longer than the life spans of both people and most modern states. But this time, we’re talking about just three years before the merger is likely to happen.
How can I watch it?
The most important thing that modern astronomy can see is two supermassive black holes coming together. In addition to being a grand event in and of itself, it is also interesting because it will help solve one of science’s biggest mysteries.
We still don’t know how the supermassive black holes at the center of galaxies get so big. The most common explanation is that this is how mergers work. But if the event in galaxy SDSS J1430+2303 happens, it will be the first one that people can see.
Since 2015, astronomers have been able to study dozens of black hole mergers. All of them, though, were big enough to be stars. The LIGO and Virgo detectors are made to pick up frequencies that match this smaller range of mass. If a really big crash is coming, we might not even feel the gravitational waves from it.
And it hasn’t been proven for sure that a pair of supermassive black holes in such a close orbit actually exist. People have recently learned how to draw monsters, but there are also a lot of other interesting things out there, like giant stars, molecular clouds where stars are made, pulsars, and filamentous radio clouds. All of these things give off energy at different frequencies, and it can be hard to know what each change in radiation means.