Su-su-su-supernova 
Supernovae like the one that formed Cas A (shown here) are crucial for life as we know it. They spread elements like the calcium in our bones and the iron in our blood across space, seeding new generations of stars and planets: go.nasa.gov/44KdDcA
Supernovae like the one that formed Cas A (shown here) are crucial for life as we know it. They spread elements like the calcium in our bones and the iron in our blood across space, seeding new generations of stars and planets: go.nasa.gov/44KdDcA
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