Galaxy protocluster at z=5.2 (IMAGE) Instituto de Astrofísica de Canarias (IAC) Caption Image of the studied galaxy cluster in formation, 12.5 billion light years from us. The circles indicate the new members discovered with the GTC, 4 of them are shown in detail. Credit Credit: NASA/ESA/GOODS-N+3DHST+CANDELS Team/Daniel López/IAC 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.