Supernova Secrets Seen In X-rays
Cassiopeia A was a star more than eight times the mass of our sun before it exploded in the cataclysmic, fiery death astronomers call a supernova. And thanks to NASA space telescopes, scientists are learning more than ever about exactly how it happened. The NuSTAR space telescope array is the first to map the radioactive material from a supernova explosion. The supernova explosion’s light arrived on Earth about 350 years ago, but even today there’s still plenty of titanium-44 to be observed.
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