Kepler's Supernova Remnant in X Rays . ... Credit Copyright: X-ray: NASA / CXC / NCSU /M. Burkey et al. ... Some type of star exploded to create the unusually shaped nebula known as Kepler's supernova remnant , but which type? ... Armed with a modern understanding of stellar evolution , early 21st century astronomers continue to explore the expanding debris cloud, but can now use orbiting space telescopes to survey Kepler's supernova remnant (SNR) across the spectrum . ... NASA Official: Jay Norris. ...