Comparison (IMAGE) Northwestern University Caption Artistic illustration depicting a side-by-side comparison of ways to produce super fast outflows in nature. Credit Bill Saxton, NRAO/AUI/NSF 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.