Reionization of Gas in the Early Universe (IMAGE) Center for Astrophysics | Harvard & Smithsonian Caption Gas in the universe as it goes through the reionization process. Credit Credit: Thesan Collaboration Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.