AS PER BOOKS I HAVE READ ABOUT UNIVERSE . I HAVE MOSTLY FOUND THAT THERES A BLACK HOLE AT THE CENTRE OF THE MILKY WAY GALAXY WHICH MAKES ALL THE STARS AROUND IT IN A FIXED POSITION NEAR IT.IS IT TRUE? IF YES THEN LIKE OUR SUN IT SHOULD MAKE EVERY THING NEAR IT ROTATE AND REVOLVE WHICH PROVES THAT SUN DOES TOO REVOLVES AND ROTATES?

 A black hole is a region of space from which nothing, not even light, can escape. It is the result of the deformation of space-time caused by a very compact mass. Black holes exist in space and are last phase of giant stars. We are familiar with the motion of stars around sun. The stars around black hole are also not stationary. They orbit the black hole at the centre of our galaxy.
According to the astronomers, it was assumed for some time that there was one star orbiting fairly close to the black hole . But now another stars has been found dipping close and orbiting even faster around the Milky Way’s central black hole.