Optical Image of the 'Tadpole' Galaxy, an Interacting Galaxy (image) Case Western Reserve University Share Print E-Mail Caption Material stripped from the galaxy during its collision with a smaller galaxy (seen in the upper left corner of the larger interaction partner) forms a long tidal tail. Young blue stars, star clusters and tidal dwarf galaxies are born in these tidal debris. These objects move in a common direction within a plane defined by the orientation and motion of their tidal tail. A similar galaxy interaction might have occurred in the Local Group in the past, which could explain the distribution of dwarf galaxies in co-rotating planes. Credit UGC 10214 ("The Tadpole"): http://www.spacetelescope.org/images/heic0206a/ Credit: NASA, Holland Ford (JHU), the ACS Science Team and ESA Usage Restrictions please give proper credit Share Print E-Mail 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.