Small Planet, Small Star (1 of 2) (IMAGE) U.S. National Science Foundation Caption This animation explains how gravitational microlensing detects planets. Credit Andrew Williams, University of Western Australia / Trent Schindler, National Science Foundation 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.