Why the universe is not expanding at an accelerating rate

Our universe is very big and infinity. If we wonder at night looking above in the sky we find its really amazing. There are millions of the stars in the sky. It was at the past time when people believed that the universe is infinity and earth is the centre of the universe. All this concepts and says are outdated to present days. They all are fake. In this era we have prove that earth is not the centre of this universe. In the same way it was in the year 2011 when three researchers got the Nobel prize in physics for their outstanding performance in finding that the universe is not expanding only but it is expanding at an accelerating rate. They said it by observing the phenomenon of supernovae. In the same way back in 1992 Hubble was the first one who gave the concept that the universe was expanding through his strong points and the relation of red shift. At his time this point was not clear so Doppler came in with his law to discuss about the relative motion between the source and listener. That is the reason due to which the approaching train has a shriller sound. It is same in the case of light and it clearly explains about the red shift.
As a research conducted by the joint effort of NASA and ESA scientist has found that universe is not expanding in a accelerating rate but it was only expanded up to 8% from its original size after big bang.
As per the research of three astronomers( Nobel prize holder) has stated that the energy which was needed for the universe to expand was derived from the dark energy. This is a unknown form of energy and this is the source of energy from which space is alive. According to the latest discovery it has discarded the previous theory by saying that during the time of big bang a lot many of the energy as well as the collective gravity of all the matters in the universe was expelled by it due to which instead of the accelerating expansion of the universe it should be of the decelerating universe.
However in spite of all this things the researchers are researching on more supernova and hope this will bring a strong evidence to prove also that the universe is not expanding at an accelerating motion. This may be proved to be the greatest discovery in the space science field and astronomy.