Chandra Release - May 24, 2011 Visual Description: Carina Nebula The image features an X-ray and optical composite image of the supernova remnant Cassiopeia A, which is a remnant of a supernova explosion in the constellation Cassiopeia. The image shows a bright blue and orange glowing object in the center, surrounded by various colors and stars. The colors represent different wavelengths of X-ray light from Chandra emitted by the supernova remnant in addition to an optical image that shows stars in the field of view. The key structures of the supernova remnant include bright blue central and outer regions, which are likely caused by high-energy particles accelerated by the explosion, and an orange halo in between. The structure of the supernova remnant resembles a sunflower, with its bright blue center and colorful petals spreading outwards. This comparison to a sunflower highlights the beauty and complexity of the supernova remnant, as well as its symmetrical structure. Overall, the X-ray and optical composite image of supernova remnant Cassiopeia A provides a fascinating glimpse into the aftermath of a catastrophic cosmic event, showcasing the vibrant colors and intricate structure of this celestial object.