Extrasolar Planet (image) ETH Zurich/Swiss Federal Institute of Technology Caption An artistic view of the HD189733 star-planet system near a half-moon phase when polarization of the light reflected by the planet reaches the maximum. Credit ETH Zurich, S.V. Berdyugina Usage Restrictions none 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.