Blackhole is the most discussed topic right now. Even, different scientists gave their valuable opinion on this matter. Some of them said it is a strong magnetic field so strong that nothing, not even light can escape. Others said it is anything but empty space. But recently based on the position, a group of astronomers has constructed the first map of supermassive black holes.

Moreover, scientists said, this map is really helpful to understand the expansion history of the Universe, when it was three billion years old. Not only this, it will help to understand of 'Dark Energy', the unknown process that is causing the universe's expansion to speed up.

Now, scientist measured the positions of quasars from the SDSS Extended Baryon Oscillation Spectroscopic Survey (eBOSS). They found extremely bright discs surrounding around supermassive black holes at the centers of distant galaxies.

However, more than 147,000 quasars were analyzed to construct the map, reported by UPI. This ancient beam was reaching towards Earth's from the Universe when it was between three and seven billion years old.

According to researchers, quasars were not enough to reveal the expansion history of the entire Universe. Researchers also need to further investigate the pattern of sound waves, which is so-called baryon acoustic oscillations. These sound waves traveled when the cosmos was hotter and denser. But after 380,000 years the condition suddenly changed, Universe spread and cooled and the waves were frozen in place.

These frozen waves are left imprinted in a 3D structure in the early universe, reported by Phys.Org. A Ph.D. student Pauline Zarrouk, from the University Paris-Saclay, said, the observed size of the BAO can be used as a 'standard ruler' to measure distances of the entire Universe.

Furthermore, there is still a question on the dark matter. Astronomers said this map will help them to understand mysterious cosmic forces (dark energy) properly. Though experts can easily measure the effects of dark energy but the reason behind it is still not well understood. They hope, in near future, they will find the concrete reason and scientific truth about the dark matter.