No galaxy is an island, and the Milky Way is no exception. After our galaxy began to form, it merged with about 15 other galaxies to build up what we see today.
A study of star clusters has identified three of them – two that are still in the process of being absorbed now, and a third bigger one that hadn’t been identified before, that has been nicknamed Kraken.
Globular clusters are dense groups of old stars that are found in most massive galaxies. The evolution …