Spiral and Elliptical Galaxies (image) Scuola Internazionale Superiore di Studi Avanzati Share Print E-Mail Caption Spiral galaxies are found to be strongly rotating, with an angular momentum higher by a factor of about 5 than ellipticals. What is the origin of such a difference? Credit Wikimedia Common 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.