4 Reviews ← exclude selected types ← exclude selected tags While galaxies are among the largest structures in the universe, some are more impressive than others. This is the case for IC 1101, a galaxy considered to be the largest of all known galaxies to date. It is important to note that the largest galaxies, also known as brightest cluster galaxies (BCGs), form by absorbing other smaller galaxies as they travel through the cosmos. Different images showing IC 1101. Nevertheless, by eliminating these light sources, they were able to detect the edges of IC 1101.