Illustration of Exoplanet (2 of 2) (IMAGE) University of Zurich Caption Possible model of exoplanets with a rocky core and gaseous atmosphere (artist's impression). Credit UZH 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.