Supergalactic Plane (IMAGE) University of Helsinki Caption In the Supergalactic Plane, which lies on the equator of the picture, galaxies experience frequent interactions and mergers, leading to the formation of massive elliptical galaxies. By contrast, galaxies away from the plane evolve in relative isolation, allowing them to preserve their disk-like structure. Credit Till Sawala Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.