Scientists have reported detecting a signal from space that tells of a long-ago collision of black holes.
The collision created a black hole of unprecedented size.
- This is the biggest bang people have ever seen since the first bang, described physics professor Alan Weinstein of Caltech University to The Guardian.
The black holes are so dense and their gravity is so strong that not even light or other electromagnetic radiation can escape from the area.
In the past, astronomers have observed two sizes of black holes.
The “small” black holes caused by the collapse of the stars are roughly the size of small towns.
Supermassive black holes, in turn, are millions, even billions of times larger than our Sun and are the centers of entire galaxies.
Their mechanism of origin is unknown.
According to the calculations of astronomers, a black hole of a different size would not make sense, as stars that have grown too large will collapse without leaving a black hole.
On the other hand, the black holes caused by star collapse are not thought to be much larger than 70 times the mass of our Sun.
However, in May 2019, a signal was observed that has now been found to originate from a collision of black holes caused by two collapsed stars.
The second black hole was 66 times the mass of our Sun and the corresponding figure for the second was 85. The result was the first known “medium” black hole with a mass of 142 times the mass of our Sun, Science Magazine says.
Because the observation devices allowed the gravitational radiation to be interpreted as an audio signal, the researchers heard the collision.
- It sounded like a stumbling block, Weinstein describes.
The collision is estimated to have taken place seven billion years ago.
However, it was only now discovered because the collision took place so far away.
Black hole collisions have also been observed in the past.
However, the resulting black hole has not been larger than the usual black hole caused by star collapse.
According to the researchers, the new discovery also raises questions about the emergence of supermassive black holes?
Could there be a collision of several smaller black holes behind them?
On the other hand, it is also possible that supermassive black holes formed immediately after the initial explosion.