Cygnus Loop and Veil Nebula – Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), Digitized Sky Survey ((DSS) STScI/AURA, Palomar/Caltech, and UKSTU/AAO), and T.A. Rector (University of Alaska, Anchorage) and WIYN/NOAO/AURA/NSF