Shell type Remnants The Cygnus Loop is an example of a shell type remnant. As the shock wave from the supernova explosion plows through space, any interstellar material it encounters becomes heated and stirred up -- thus producing a big shell of hot material in space. We see the ring-like structure because when we look at the edge of the shell, there is more hot gas on our line of sight then when we look through the middle. Astronomers call this limb brightening. Image credit: Levenson et al. Search for an Image: (Enter the name of an object.) Additions or Comments: Have we left anything out? Is there something you would like to have added to this page (a link to your own group's research page, for example...)? IMAGES | By Mission | Stars | Cataclysmic Variables | X-ray Binaries | Pulsars | Supernova Remnants & Planetary Nebulae | Galaxies | Active Galactic Nuclei | Clusters and Groups of Galaxies | X-ray/gamma-ray Background & Deep Fields | Solar System Objects | Gamma Ray Bursts HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Thursday, 26-Jun-2003 13:48:44 EDT