![Composite images of the Cas A supernova remnant that looks like a spherical cloud resembles a hazy ball of turquoise and neon blue lightning, marbled with veins of gold.](https://www.nasa.gov/wp-content/uploads/2023/03/casa_streams_lg.jpeg)
IXPE Measures Exploded Star Remains
When a massive star collapsed in the Cassiopeia constellation, it generated a supernova explosion with some of the fastest shockwaves in the Milky Way.
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https://www.nasa.gov/image-detail/ixpe-measures-exploded-star-remains/
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