Will Zhang Holds Silicon Mirror Segments (IMAGE) NASA/Goddard Space Flight Center Caption Goddard scientist Will Zhang holds mirror segments made of silicon. These X-ray optics have been baselined for the proposed Lynx X-ray Observatory. Credit Credits: Chris Gunn/NASA 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.