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Data from Chandra and Webb of the supernova remnant Cassiopeia A (Cas A) have been combined for the first time, helping to explain an unusual structure within the debris field and address other questions about the supernova explosion that created it. These images show X-rays from Chandra, infrared data from Webb and Spitzer, and optical data from Hubble. Astronomers using these data found that the so-called Green Monster near the center of Cas A was created by a blast wave from the exploded star slamming into material surrounding it.

Composite Image of Cassiopeia A with “Green Monster”

Data from Chandra and Webb of the supernova remnant Cassiopeia A (Cas A) have been combined for the first time, helping to explain an unusual structure within the debris field and address other questions about the supernova explosion that created it. These images show X-rays from Chandra, infrared data from Webb and Spitzer, and optical data from Hubble. Astronomers using these data found that the so-called Green Monster near the center of Cas A was created by a blast wave from the exploded star slamming into material surrounding it.

Image Credit: X-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; IR: NASA/ESA/CSA/STScI/Milisavljevic et al., NASA/JPL/CalTech; Image Processing: NASA/CXC/SAO/J. Schmidt and K. Arcand

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Image CreditX-ray: NASA/CXC/SAO; Optical: NASA/ESA/STScI; IR: NASA/ESA/CSA/STScI/Milisavljevic et al., NASA/JPL/CalTech; Image Processing: NASA/CXC/SAO/J. Schmidt and K. Arcand
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