A Star Census (IMAGE) Iowa State University Caption A star like our sun is shown with an orbiting planet in the foreground. NASA's Kepler Mission is studying sun-like stars by tracking changes in their brightness, or their oscillations. Credit Illustration by Gabriel Perez Diaz, Instituto de Aastrofisica de Canarias (MultiMedia Service). 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.