Kepler's Supernova Remnant in X-RaysImage Credit: X-ray:
+NASA/CXC/NCSU/M. Burkey et al. Optical: DSS
http://apod.nasa.gov/apod/ap130515.htmlWhat caused this mess? Some type of star exploded to create the unusually shaped nebula known as Kepler's supernova remnant, but which type? Light from the stellar explosion that created this energized cosmic cloud was first seen on planet Earth in October 1604, a mere four hundred years ago. The supernova produced a bright new star in early 17th century skies...
...and 13 more photos.
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