Simulation of M87* at 230 GHz and 345 GHz (IMAGE) Center for Astrophysics | Harvard & Smithsonian Caption Side-by-side simulated images of M87* show the improvement in clarity and resolution from 230 GHz to 345 GHz. These improvements are allowing scientists to measure the size and shape of black holes more precisely. Credit EHT, D. Pesce, A. Chael Usage Restrictions Credit must be given to the creator. License CC BY 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.