25/08/2026
Supernova remnant Cassiopeia A is spectacular in the James Webb Space Telescope image, but here it gains some extra pop 🎆 by combining with observations from the Chandra X-ray Observatory.
Chandra’s X-ray vision reveals the blast wave (in blue) that tore through the star plus elements in the debris field like iron, calcium, and oxygen. Webb’s infrared data also show the expanding shell of material from the explosion plus cosmic dust throughout the remnant in pink and red.
Credit: X-ray: NASA/CXC/SAO; IR: NASA/ESA/CSA/STScI; Image Processing: NASA/CXC/SAO/L. Frattare and K. Arcand.