APS_Asteroid-Research1 (IMAGE) DOE/Argonne National Laboratory Caption Argonne Distinguished Fellow Esen Ercan Alp, right, and physicist and group leader Jiyong Zhao, left, at APS Beamline 3-ID-B, where scientists measured the composition of fragments of a near-Earth asteroid. Credit (Image by Jason Creps/Argonne National Laboratory.) Usage Restrictions Original Content License Original 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.