This image comes from a very deep Chandra observation of the Tycho supernova remnant in the Milky Way, produced by the explosion of a white dwarf star in our galaxy.

The stripes are seen in the high-energy X-rays (blue) that also show the blast wave, a shell of extremely energetic electrons. Low-energy X- rays (red) show expanding debris from the supernova explosion. The stripes, seen to the lower right of this composite image that includes optical data from the Digitized Sky Survey, may provide the first direct evidence that a cosmic event can accelerate particles to energies a hundred times higher than achieved by the most powerful particle accelerator on Earth.