Notable supernova remnants
Supernova remnants (SNRs) are the ejected debris of supernova explosions from dying or dead stars. SNRs form expanding shells, bows, or bubbles of highly-engergized gas and interstellar material that are swept up in the shock wave. Supernovae generate most of the heavier elements in the periodic table as a result of the intense pressures and temperatures from the explosion. Supernovae are of two primary types:
Type Ia supernova - caused by exploding white dwarf stars after they feed too much from a binary companion star over time until they reach critical mass. Often the white dwarf is obliterated afterward.
Type II supernova - caused by the gravitational core-collapse of high-mass stars that stop generating fusion in the core, collapsing inward under gravity, then exploding outward, leaving a neutron star or black hole.
| SNR | TYPE | CONSTELLATION |
| Manatee Nebula | II | Aquila |
| W44 | II | Aquila |
| W49B | II | Aquila |
| 3C 58 | II | Cassiopeia |
| Cassiopeia A | II | Cassiopeia |
| Tycho's Nova | Ia | Cassiopeia |
| G292.0+01.8 | II | Centaurus |
| G306.3-0.9 | Centaurus | |
| SN 185 | Ia | Circinus |
| Bat Nebula | II | Cygnus |
| Cygnus Loop | II | Cygnus |
| Eastern Veil Nebula | II | Cygnus |
| Veil Nebula | II | Cygnus |
| Western Veil Nebula | II | Cygnus |
| LMC N49 | II | Dorada |
| SN 1987A | II | Dorado |
| Tarantula Nebula | II | Dorado |
| Kesteven 75 | II | Eagle |
| Jellyfish Nebula | II | Gemini |
| SN 1006 | Ia | Lupus |
| RCW 103 | II | Norma |
| Kepler's Nova | Ia | Ophiuchus |
| Puppis A | II | Puppis |
| G1.9+0.3 | Sagittarius | |
| Sag A East | Sagittarius | |
| G350.1-0.3 | II | Scorpius |
| Crab Nebula | II | Taurus |
| Spaghetti Nebula | II | Taurus |
| E0102 | II | Tucana |
| Vela Junior | II | Vela |
| Vela SNR | II | Vela |