Blue ultradiffuse galaxy (IMAGE) University of California - Riverside Caption Image shows the fall of a blue ultradiffuse galaxy into a galaxy system and its subsequent ejection as a red ultradiffuse galaxy (having already lost its gas). Credit Vanina Rodriguez. Usage Restrictions None. License Original 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.