Soon there will be a collision of two black holes

At the center of the Bootes galaxy are two black holes, one
revolving around the other. Their total mass is about 800
million times greater than the Sun, while by space standards
they are small, smaller than the size of the Earth's orbit. They
move closer, then move away from each other. When black
holes approach each other, there is a small flash.
Astronomers have been watching (https://bit.ly/3JXj1Oh) these
flares for a long time, and they have noticed that flares are
becoming more frequent. A few years ago, such an outbreak
happened once a year. Now once a month. This means that the
smaller black hole is rapidly approaching the larger one. As
calculated by a group of astronomers, a maximum of a thousand
days before a complete merger. That is, it will happen either
this year or next year. For the first time in history, scientists
will observe the merger of two black holes.