Composite X-ray and optical image of the remnant of Kepler's supernova. (IMAGE)

Royal Astronomical Society

Composite X-ray and optical image of the remnant of Kepler's supernova.

Caption

The red, green and blue colours show low, intermediate and high energy X-rays observed with NASA's Chandra X-ray Observatory, and the star field is from the Digitized Sky Survey.

Credit

Credit: NASA / CXC / NCSU / JPL-Caltech / M. Burkey et al.

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