Keywords: G11.2-0.3.jpg en G11 2-0 3 is a circularly symmetric supernova remnant that contains a dense rotating dead star at its center representing a textbook case of what the remnant of an exploding star should look like after a couple thousand years When a massive star collapses the outer layers of the star are blown away in an extremely energetic explosion Depending on the mass of the original star a dense object such as a neutron star or a black hole can form and be left behind at the explosion's center Such a neutron star known as a pulsar when it rapidly rotates can be kicked by the thermonuclear shock wave created when the star exploded causing it to race through space at millions of miles per hour 2006-12-06 08 43 03 http //chandra harvard edu/photo/2007/g11/ X-ray NASA/CXC/Eureka Scientific/M Roberts et al ; Radio NRAO/AUI/NSF PD-USGov Uploaded with UploadWizard G11 2-0 3 |