[6] A team of scientists decided to observe the Leo Cluster with the intention of creating a catalog of extended ionized gas (EIG) clouds.

These star-forming galaxies turned out to be very similar to those found in the neighboring Coma cluster.

This has led to the creation of a "hot zone" where stars are unable to maintain their gas long enough to properly form.

The second subpopulation contains red-sequence lenticular (lens shaped) galaxies whose ages are directly tied to their mass.

The third and final subpopulation is of galaxies where star formation is still taking place, and are morphologically distributed.