Kepler-186f (IMAGE) University of Washington Caption An artist’s depiction of Kepler-186f, an Earth-sized exoplanet, showing a hypothetical surface that includes partial ice coverage at the poles. Credit NASA Ames/SETI Institute/JPL-Caltech Usage Restrictions Must include credit License Original 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.