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Cassiopeia A is one of the most well-studied supernova remnants in our galaxy. It's the expanding shell of material from a massive star that exploded approximately 340 years ago (from our perspective on Earth). What we're seeing is the aftermath of this violent stellar death - hot gas expanding outward at tremendous speeds, creating the complex structures visible in the image. This particular visualization is a composite or enhanced image that combines data from different wavelengths to highlight the intricate structures of the remnant. The purple regions likely represent different elements or temperature zones within the expanding shell of debris.

3D Models

3D Models

Explore interactive websites and 3D models.

Cat's Eye Nebula 3D Model
Interact with our 3D model of the Cat's Eye Nebula to witness the mesmerizing layers and cosmic architecture of a star's magnificent final chapter.
Explore Cats Eye
Messier 51 3D Model
Download Messier 51's stunning spiral structure to explore or 3D print your own Whirlpool Galaxy.
Explore Messier 51
Cassiopeia A 3D Model
Explore the stellar explosion of Cassiopeia A in immersive 3D, walking through the actual remnants of this 340-year-old supernova.
Explore Cassiopeia A