Exoplanet System (image) University of Arizona Caption This is an artist's impression of a young, giant exoplanet orbiting its host star. Credit NASA/JPL-Caltech Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. 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.