In an astonishing discovery, astronomers have found 854 new “ultra dark galaxies”. These galaxies were discovered in the Coma Cluster (a region rich in galaxy clusters and contains thousands of galaxies) 320 light years ago with the help of Subaru Telescope. According to astronomers, ultra darkness of these galaxies is due to the presence of mysterious dark matter.
Researchers from Stony Brook University, which led to the discovery, said that the newly discovered galaxies contains less than 1 percent visible matter which is very less when compared to other parts of the universe. While explaining he added that these galaxies lost the gas needed to create new stars during their formation period nearly billions of years ago.
The study found that these galaxies are very diffuse and more than 99 percent is covered with dark matter and only 1 percent constitutes the visible space which includes stars and other celestial bodies. “Not only these galaxies appear very diffuse, but they are very likely enveloped by something very massive,” said principal examiner Jin Koda, astrophysicist at Stony Brook University in New York.
Astronomers believe that some force must be protecting and binding these fragile galaxies.
Moreover, Sabaru Telescope is located at the Mauna Kea Observatory on Hawaii. It is 8.2-metre long telescope maintained by National Astronomical Observatory of Japan since 1999. It has been nearly 16 years that the NAOJ is maintaining the data collected by Sabaru Telescope. In 2014, the telescope first discovered 47 such dark galaxies and now it has led to the discovery of another 800 galaxies.
The study appeared in the Astrophysical Journal Letters.