Galaxy Composed Mostly of Dark Matter Discovered

Astronomers have confirmed the existence of a unique galaxy, CDG-2, which is almost entirely composed of dark matter. Located about 300 million light-years away, this 'dark galaxy' was identified by four globular clusters previously considered independent. Using data from Hubble, Euclid, and Subaru telescopes, scientists observed a faint glow surrounding these clusters, indicating the underlying galaxy. The analysis shows that 99.94 to 99.98 percent of CDG-2's mass is dark matter. Dark galaxies like CDG-2 are rare and provide essential insights into dark matter, a crucial component of the universe's structure.