21 March 2014
Vol 343, Issue 6177

About The Cover

Cover image expansion

COVER Composite image from NASA's Hubble Space Telescope of the spiral galaxy M83 (diameter ~70% that of the Milky Way). Embedded near the center of this image is a stellar-mass black hole that bombards its surroundings with kinetic energy through hugely powerful jets. See pages 1318 and 1330. Image: NASA, ESA, and the Hubble Heritage Team (STScI/AURA); W. P. Blair (STScI/JHU)