Scientists have recently spotted a new dwarf galaxy which is orbiting the Milky Way. But physicists at Carnegie Mellon, Brown and Cambridge Universities after researching about the dwarf galaxy revealed that the galaxy looks like it is radiating gamma rays.

According to scientists they found the galaxy, called Reticulum 2, by studying the data collected during the Dark Energy Survey.

Reticulum 2 is located nearly 98,000 light years away from earth. It is one of the closest dwarf galaxies ever discovered by scientists.

Data from NASA's Fermi Gamma-ray Space Telescope showed that gamma rays from the dwarf galaxy are coming at levels above what is normally expected.

Scientists said that presently they are not sure about the reason what is causing these gamma rays, but they said that it can be an indication of a dark matter at the center of the galaxy.

Savvas Koushiappas, co-author of the discovery and physics professor at Brown University, said that gamma radiation in a dwarf galaxy is a certain marker of dark matter.

Lead author Alex Geringer-Sameth said, "Something in the direction of this dwarf galaxy is emitting gamma rays. There's no conventional reason this galaxy should be giving off gamma rays, so it's potentially a signal for dark matter".

It must be noted that dark matter is an elusive element of the universe since it neither absorbs nor emits light. So, it is impossible to be caught with a space telescope, or any other optical instruments.

Scientists for long believed that dark matter, which is considered to account for more than 80% of the cosmic matter, is present wherever any unexplained gravitational effects on the visible matter are observed.

In addition, Koushiappas said that gamma radiation in larger galaxies can have variable sources such as pulsars and supermassive black holes. But such a radiation in a dwarf galaxy is clean and quiet system, he said.