Black Widow Binary (image) Dunlap Institute for Astronomy & Astrophysics Share Print E-Mail Caption The pulsar PSR B1957+20 is seen in the background through the cloud of gas enveloping its brown dwarf star companion. Credit Dr. Mark A. Garlick; Dunlap Institute for Astronomy & Astrophysics, University of Toronto Usage Restrictions Use is restricted to stories related to this result. Use must include image credit. 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.