№ files_lp_4_process_3_135589
Transcript of an astronomical image tour describing infrared observations of the Cassiopeia A supernova remnant, its shockwave structures, stellar debris composition, light echoes, and the surrounding interstellar environment revealed by the James Webb Space Telescope.
Object: Cassiopeia A (Cas A)
Astronomical Object Type: Supernova remnant
Constellation: Cassiopeia
Distance from Earth: 11,000 light-years
Estimated Explosion Epoch: about 340 years ago (as observed from Earth)
Remnant Size: about 13 light-years (approximately 76 trillion miles) across
Observational Instrument: NIRCam (Near-Infrared Camera)
Observatory / Telescope: James Webb Space Telescope
Observation Method: Infrared imaging
Observed Elements in Ejecta: sulfur, oxygen, argon, neon
Phenomena Described: shockwaves, stellar debris fragments, circumstellar gas interaction, light echoes
Related Feature: “Baby Cas A” light echo region
Distance of Baby Cas A from the remnant: about 170 light-years behind Cassiopeia A
Scientific Field: Astronomy / Astrophysics
Subject Focus: structure and composition of supernova remnants and distribution of stellar material
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