Astronomers were measuring the speed of stars revolving around a dwarf galaxy, Triangulum II, when they became suspicious that dark matter might be present in the galaxy. It was when they tried to measure its mass, astronomers realized the presence of dark matter.

Astronomers said this particular galaxy as per cosmic standards is welterweight. Upon assessment, the astronomers came to know that the galaxy is filled with dark matter. Astronomer Evan Kirby, of the California Institute of Technology (Caltech) in Pasadena, said, "The total mass I measured was much, much greater than the mass of the total number of stars - implying that there's a ton of densely packed dark matter contributing to the total mass".

With the help of Keck Observatory, Kirby's team measured the speed of stars inside the galaxy. The researchers said the galaxy was found to be having more mass than by adding up all the stars' masses.

In fact, the researchers came to know that the galaxy was having the highest concentration of dark matter that has been discovered till date in any galaxy. Now, there are number of theories going around explaining what the exact reason is behind.

One of the explanations, Triangulum II, could be having a dense cloud of Weakly Interacting Massive particles (WMIPs). These are the hypothetical particles having mass, but they do not interact with normal matter.

Triangulum II is termed as a dead galaxy. Therefore, the dwarf galaxy should not produce high energy radiation like gamma rays. Kirby said he would be carrying out more research to know better what is exactly happening.