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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.

“Supernova Secrets Seen In X-rays” is categorized as “science and technology”. This video was licensed from Grab Networks. For additional video content, click the “video” tab at the top of this page.

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