The Faint Pulsar PSR B1929+10 (IMAGE) Max-Planck-Gesellschaft Caption Fig. 2: The faint pulsar PSR B1929+10 captured by the unrivalled sensitivity of ESAs XMM-Newton orbiting X-ray observatory. It is speeding through space in the direction of the arrow at a speed of 177 kilometres per second. At this speed, the pulsar leaves a trail of X-ray emitting electron plasma stretching across space. Credit Image: Werner Becker / MPI for Extraterrestrial Physics 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.