Thanks to Help from Hubble, The First Confirmed Exomoon? (image) American Association for the Advancement of Science Share Print E-Mail Caption Artist's impression of the exoplanet Kepler-1625b with it's large hypothesized moon. The pair have a similar mass and radius ratio to the Earth-Moon system but scaled up by a factor of 11. Credit Dan Durda Usage Restrictions Please cite the owner of the material when publishing. This material may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail 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.