NASA snaps colorful heart of a supernova

A closer look at the heart of supernova (CNN/NASA)

(CNN/NASA) — Astronomers are getting a closer look at what happens in the heart of an exploding star.

This image was collected by NASA’s X-ray NuSTAR telescope.

It’s the first to map radioactive material in a so-called supernova. The blue color highlights the radioactive material.

Blown-out pieces from a massive exploding star produced this remnant known as “Cassiopeia A.”

It is located about 11,000 light years away from Earth.

Astronomers found radioactive Titanium-44, an unstable isotope, was produced in the heart of the exploding star.

The energy from that eventually blew off the star’s outer layers.

The full results are published in the journal nature. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Users who violate these terms, including use of vulgar language or racial slurs, will be banned. If you see an inappropriate comment, please flag it for our moderators to review.

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