Mars and Phobos (IMAGE) NASA/Goddard Space Flight Center Caption Over the course of 22 minutes, Hubble took 13 separate exposures, allowing astronomers to create a time-lapse image showing the tiny moon Phobos during its orbital trek (white dots) around Mars. This image is a composite of separate exposures acquired by NASA's Hubble WFC3/UVIS instrument. Credit Over the course of 22 minutes, Hubble took 13 separate exposures, allowing astronomers to create a time-lapse image showing the tiny moon Phobos during its orbital trek (white dots) around Mars. This image is a composite of separate exposures acquired by NASA's Hubble WFC3/UVIS instrument. Usage Restrictions None 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.