Cassiopeia A Supernova Remnant - NASA’s X-ray & Infrared Composite Image #2223188 (License: Personal Use)

This composite image shows Cassiopeia A (Cas A), a supernova remnant located about 11,000 light-years away in the constellation Cassiopeia. The brilliant blue filaments represent high-energy X-rays emitted by multimillion-degree gas expanding outward from the exploded star’s core, while embedded point sources are neutron stars and background galaxies. Data from NASA’s Chandra X-ray Observatory and infrared telescopes combine to highlight shock waves and heavy elements forged in the cataclysm.

Used on astronomy education sites, NASA mission pages, and science blogs to illustrate stellar life cycles, supernovae, and multiwavelength imaging. Matches user intent for learning about cosmic explosions, space imagery, or astrophysics visuals.