Astronomers using the Hubble, Euclid, and Subaru telescopes have discovered one of the most dark-matter-dominated galaxies ever seen, named CDG-2, about 245 million light-years away.

Unlike typical galaxies, which are five times more dark matter than ordinary matter, CDG-2 is composed of roughly 99% dark matter, making it extremely faint and nearly invisible.

The galaxy was detected through a cluster of four globular star clusters in the Perseus galaxy cluster, marking the first time a galaxy has been found solely via its globular cluster population.

CDG-2 has a total brightness equivalent to about six million suns, with most of its stars likely stripped away by gravitational interactions with neighboring galaxies, Space.com has reported.

This discovery highlights the extreme dominance of dark matter in some galaxies and demonstrates a new method for detecting near-invisible cosmic structures.