This image from the Chandra X-ray Observatory, the world's most powerful X-ray telescope, shows the Cygnus Loop, also known as the Veil Nebula, a supernova remnant of the explosive death of a massive star. This 3D model is the result of a simulation showing the interaction of a blast wave from the explosion with an isolated cloud of the interstellar medium, dust and gas in between the stars. via NASA/SAO/CXC
