Chandra X-ray Image of W28
Data from NASA’s Chandra X-ray Observatory give new detail into the heart of supernova remnant W28. In this close-up view of the center of the remnant, low-energy X-rays are colored red, the medium are green, and the highest found by Chandra are blue. The Chandra data show the shape and extent of the high-energy emission in the central region. By studying W28 and others like it, astronomers hope to better understand the complexities involved when a star explodes in a crowded neighborhood.
(Credit: NASA/CXC/HSC/J. Keohane et al.)

Optical, ROSAT X-ray & Radio Images
This composite shows a classic example of mixed-morphology supernova remnant known as W28. Each wavelength shows detailed structure of how the supernova shock wave is interacting, or has interacted, with the complex cloudy environment which surrounded its parent star. The background stars and fine structure are seen in optical light (grey and white) by the Cerro Tololo Inter-American Observatory in Chile. The radio (orange) data was obtained by the Very Large Array in New Mexico, while the blue in the wide-field view comes from the ROSAT satellite (X-rays).
(Credit: ROSAT X-ray: NASA/ROSAT; Optical: NOAO/CTIO/P.F. Winkler et al; Radio: NSF/NRAO/VLA/G. Dubner et al.)