Mars Could get a Ring (IMAGE) University of California - Berkeley Caption Mars could gain a ring in 10-20 million years when its moon Phobos is torn to shreds by tidal forces due to Mars' gravitational pull. Credit Image by Tushar Mittal using Celestia 2001-2010, Celestia Development Team. 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.