It has been reported that over the past eight billion years, structure of several galaxies in the universe has changed considerably. The galaxies took different shapes such as oval clusters and round discs. Data on approximately 10,000 galaxies in the Universe was studied by an international team of scientists.
After that, they used Hubble and Herschel telescopes in order to come up with the finding. As per a statement from the Cardiff University’s School of Physics and Astronomy, it has been found by scientists that 83% of stars that have been formed since the Big Bang nearly 13.7 billion years ago were assembled in rotating, disc-shaped galaxies in the beginning.
According to it, “However, only 49 percent of stars that exist in the Universe today are located in these disc-shaped galaxies, the remainder are located in oval-shaped galaxies. The results suggest a massive transformation in which disc-shaped galaxies became oval-shaped galaxies”.
As per reports, the team came up with two hypotheses i.e. oval galaxies could be formed when two clusters having shape of a disc, approach one another and merge into a disorderly cluster as a result of gravity, or the stars in a flat and round galaxy slowly migrate in the direction of the centre so as to produce a nearly oval-shaped cluster.
According to lead author Steve Eales, such huge change in structure was theorized earlier; however, for the first time, the extent of change has been measured with help of Herschel and Hubble.
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