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The Chandra image shown in the inset ("Chandra Close-up") reveals a comet-shaped X-ray source well outside the boundary of the supernova remnant.
Based on earlier observations, astronomers estimate that the age of MSH 11-61A, as it appears in the image, is approximately 15,000 years, and it lies at a distance of about 30,000 light-years away from Earth.
I'd love it if my computers were someday one of the ones that discovered an unknown pulsar