JunoCam Image (IMAGE) Southwest Research Institute Caption JunoCam acquired three images of Io prior to when it entered eclipse, all showing a volcanic plume illuminated beyond the terminator. The image shown here, reconstructed from red, blue and green filter images, was acquired at 12:20 (UTC) on Dec. 21, 2018. The Juno spacecraft was approximately 300,000 km from Io. Credit NASA/SwRI/MSSS Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only 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.