Herschel Telescope (IMAGE) Naval Research Laboratory Caption The Herschel telescope is almost entirely made of silicon carbide, a highly polishable, stable, and lightweight ceramic material and coated with a very thin layer of aluminum, for reflectivity. Credit European Space Agency 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.