The expanding debris cloud known as Cassiopeia A is an example of the final phase of the stellar life cycle. This false-color image was out together using X-ray and optical image data from the Chandra X-ray Observatory and Hubble Space Telescope. IT shows the still hot filaments and knots in the remnant which span about 30 light-years. High-energy X-ray emission from specific elements have been color coded red for silicon, yellow for sulphur, green for calcium, and purple fr iron. The outer blast wave is shown in blue. The bright speck near the center is a neutron star, the incredibly dense, massive collapsed remains of the star’s core.
Image Credits: NASA /STScI