James Webb Space Telescope Reveals Never-Before-Seen Details in Cassiopeia A Kids T-Shirt

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"Cassiopeia A (MIRI Image)"

Webb Reveals Never-Before-Seen Details in Cassiopeia A

Release Date: April 7, 2023

Stars: always making a dramatic exit!

Webb’s powerful infrared eye has captured never-before-seen detail of Cassiopeia A (Cas A), the remnant of a massive star that exploded about 340 years ago - from our perspective here on Earth. (Despite being 11,000 light-years away, this supernova may have been visible to the naked eye when it took place, something that has not been seen in our galaxy since.)

Let’s dissect the image: The left side of the image (shown in orange) marks where ejected material from the exploded star is ramming into surrounding gas and dust. Within that outer shell is material from the star itself, including elements like oxygen, argon and neon. What’s that green loop on the right? Scientists are still puzzling out its unexpected shape and complexity.

As the youngest known remnant from an exploded, massive sta...

Based in Colorado Springs, Colorado USA, I'm a nature and landscape photographer primarily focused on the Colorado Rocky Mountains. Working in both color and black and white, I use a variety of photographic techniques to capture the many moods of mountain landscapes, from intimate perspectives to grand vistas, in locations both iconic and seldom-visited. My goal is to produce images with vivid colors, high dynamic range, and compelling compositions. Longer lens focal lengths are preferred to bring the viewer closer into the scene, requiring every available pixel to help tell the story. Thank you for visiting the site. I hope you enjoy my work. "The mountains are calling and I must go." -- John Muir