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Recent Podcast
A Tour of SDSS J103842.59+484917.7
A Tour of SDSS J103842.59+484917.7
One hundred years ago this month, Albert Einstein published his theory of general relativity, one of the most important scientific achievements in the last century. (2015-11-24)

Kepler's Supernova Remnant in 60 Seconds

Narrator (April Hobart, CXC): This image of Kepler's supernova remnant shows the expanding ball of debris from a supernova explosion in our galaxy. The supernova itself was seen in 1604 by Johannes Kepler and others. The different colors in the Chandra X-ray data show different energies in the supernova remnant, and optical data from the Digitized Sky Survey shows stars in the field. The Kepler supernova was the thermonuclear explosion of a white dwarf. New analysis suggests that the supernova explosion was not only more powerful, but might have also occurred at a greater distance, than previously thought.

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