EXPLODING GALAXY? The placid flat cigar of edgewise starburst galaxy M82 spews violent, right-angle eruptions in this composite view, which were for many years a source of confusion.

X-ray: NASA/CXC/JHU/D. Strickland; Optical: NASA/ESA/STScI/AURA/The Hubble Heritage Team; Infrared: NASA/JPL-Caltech/Univ. of Arizona/C. Engelbracht