File:Cas A (NIRCam image) (weic2330a).jpg

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current	10:12, 11 December 2023		11,694 × 13,392 (22.58 MB)	commons>OptimusPrimeBot	#Spacemedia - Upload of https://cdn.esawebb.org/archives/images/large/weic2330a.jpg via Commons:Spacemedia

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Author	Space Telescope Science Institute Office of Public Outreach
Copyright holder	Public
Source	ESA/Webb
Credit/Provider	NASA, ESA, CSA, STScI, D. Milisavljevic (Purdue University), T. Temim (Princeton University), I. De Looze (University of Gent)
Short title	Cas A (NIRCam image)
Image title	A new high-definition image from the NASA/ESA/CSA James Webb Space Telescope’s NIRCam (Near-Infrared Camera) unveils intricate details of supernova remnant Cassiopeia A (Cas A), and shows the expanding shell of material slamming into the gas shed by the star before it exploded. The most noticeable colours in Webb’s newest image are clumps of bright orange and light pinkthat make up the inner shell of the supernova remnant. These tiny knots of gas, composed of sulphur, oxygen, argon, and neon from the star itself, are only detectable thanks to NIRCam’s exquisite resolution, and give researchers a hint at how the dying star shattered like glass when it exploded.The outskirts of the main inner shell look like smoke from a campfire. This marks where ejected material from the exploded star is ramming into surrounding circumstellar material. Researchers have concluded that this white colour is light from synchrotron radiation, which is generated by charged particles travelling at extremely high speeds and spiralling around magnetic field lines. There are also several light echoes visible in this image, most notably in the bottom right corner. This is where light from the star’s long-ago explosion has reached, and is warming, distant dust, which glows as it cools down. [Image description: A roughly circular cloud of gas and dust with complex structure. The inner shell is made of bright pink and orange filaments studded with clumps and knots that look like tiny pieces of shattered glass. Around the exterior of the inner shell, there are curtains ofwispy gas that look like campfire smoke. Around and within the nebula, various stars are seen as points of blue and white light. Outside the nebula, there are also clumps of dust, coloured yellow in the image.]
Usage terms	Creative Commons Attribution 4.0 International License
Date and time of data generation	02:00, 11 December 2023
Software used	Adobe Photoshop 25.1 (Macintosh)
File change date and time	11:32, 30 November 2023
Date and time of digitizing	06:46, 12 January 2023
Date metadata was last modified	09:44, 30 November 2023
Unique ID of original document	xmp.did:00d35124-1e90-4bb9-b780-319621682bd4
Copyright status	Copyright status not set
Keywords	Cassiopeia A SNR G111.7-02.1
Contact information	outreach@stsci.edu https://esawebb.org ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States 410-338-4444
IIM version	4

File:Cas A (NIRCam image) (weic2330a).jpg

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