Phobos (image) Purdue University Share Print E-Mail Caption Phobos, a Martian moon, might eventually disintegrate and form a ring around the red planet, according to a new theory by Purdue University scientists. The NASA-funded research indicates that this process of moons breaking apart into rings and then reforming as moons may have happened several times over billions of years. Credit Image by Purdue University Envision Center Usage Restrictions None 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.