Galaxy Rotation (VIDEO) International Centre for Radio Astronomy Research This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Astronomers have discovered that all galaxies rotate once every billion years, no matter how big they are. Credit ICRAR Usage Restrictions Only for this news story 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.