(IMAGE) National Institutes of Natural Sciences Caption Red circles and blue double-circles represent the galaxies with single- and double-component ACS sources, respectively. The research team's idea that most of the galaxies consist of two (or more) interacting small galaxies with small angular separation is also illustrated, which explains the observed trend very well. Credit Ehime University Usage Restrictions None License Licensed content 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.