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This image from NASA’s Chandra X-ray Observatory shows the location of different elements in the Cassiopeia A supernova remnant including silicon (red), sulfur (yellow), calcium (green) and iron (purple). Each of these elements produces X-rays within narrow energy ranges, allowing maps of their location to be created. The blast wave from the explosion is seen as the blue outer ring. Astronomers study supernova remnants to better understand how stars produce and then disseminate many of the elements on Earth and in the cosmos at large.

NASA’s Chandra Reveals Star’s Inner Conflict Before Explosion

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Artist's concept of an asteroid

NASA Marsquake Data Reveals Lumpy Nature of Red Planet’s Interior

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What’s Up: September 2025 Skywatching Tips from NASA

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Juno Detected the Final Missing Auroral Signature from Jupiter’s Four Largest Moons

Juno Detected the Final Missing Auroral Signature from Jupiter’s Four Largest Moons

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Hubble Homes in on Galaxy’s Star Formation

Hubble Homes in on Galaxy’s Star Formation

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NASA’s Chandra Reveals Star’s Inner Conflict Before Explosion

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Upcoming Launch to Boost NASA’s Study of Sun’s Influence Across Space

Upcoming Launch to Boost NASA’s Study of Sun’s Influence Across Space

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Juno Detected the Final Missing Auroral Signature from Jupiter’s Four Largest Moons

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Hubble Spies Galaxy with Lots to See

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Hubble Spies Galaxy with Lots to See

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National Aviation Day: Celebrating NASA’s Heritage While Charting Our Future

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NASA Accepts Proposals for 2026 Student Launch Challenge

NASA Accepts Proposals for 2026 Student Launch Challenge

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Test

James R. Riordon

Aug 28, 2025

Article

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