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Supernova remnant Cassiopeia A between 2022 and 2025. JWST NIRCam
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Supernova remnant Cassiopeia A between 2022 and 2025. JWST NIRCam

SpacePorn·Neaterntal·about 5 hours ago
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Video

Black and white image of the expanding clouds.

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Expansion of the remnant on the upper right. Moving knots on the lower left. Fast changing regions are the light echo from the light of the explosion. #JWST NIRCam F444W images.

There not only an expansion of the bright material, but also new bright material appearing (center in the upper left). Maybe an astronomer can explain this. Material that only now gets shocked?

Video

Material moving towards the lower right with new material seemingly appearing at the upper left rim.

https://bsky.app/profile/melina-iras07572.bsky.social/post/3myrorm4tr22l

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processed by Melina Thévenot

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