introduction
In simple terms, black holes are objects that have such a strong gravitational force that even light cannot escape.
Scientists have proved that every galaxy has a supermassive black hole. Along with 200 to 400 billion stars in our Milky Way galaxy, there is also a supermassive black hole known as "Sagittarius".
Astronomers believe that it is so big that it can contain 4 million 4000000 suns.
There is not just one, but countless black holes in our Milky Way galaxy.
Surprisingly, there are trillions of galaxies like the Milky Way in the observable universe.
How a galaxy is formed?
There are uncountable stars like our sun, which cannot be counted even by a crore of super computers, that is why astronomers have given the name galaxy to the collection of stars in the number of crores and billions.
How does a Cluster of galaxies form?
The problem here is that the galaxies were uncountable, so many galaxies were collected together and given a name, which is called cluster.
Super cluster
Due to the high number of these clusters, many clusters form a supercluster.
Currently, we have only explored 5% of the universe
We do not know 95% of what the universe is and what it is made of and where it is spread.