Nebulas resulting from supernova explosions are much more rare than the former type, but usually very beautiful. These nebulas are not, as the planetary ones, seemingly organized and circular. The supernova remnants create a disordered, yet stunning mosaic of colorful gas and dust. The most famous nebula resulting from a supernova explosion is called the Crab Nebula. One may think that this nebula would quickly fade away, like the smoke from a simple explosion.

Diffuse Nebulas are mostly very large structures, sometimes spanning a few light-years. They often appear to be emitting clouds of gas from the center, but this in-fact does not occur. What does happen within them is the gas, dust and matter interact in violent, hectic currents. A famous Diffuse Nebula is the Great Nebula in Orion, located in the constellation Orion, on the sword, in the location of the middle star.
Dark Nebulas are diffuse and dark structures that appear as silhouettes in the night sky. The reason for the lack of luminosity is because these nebulas do not have any neighboring light sources, such as bright stars, nearby. Dark Nebulas not only lack the ability to emit or produce any light, they obscure the celestial objects surrounding them, making those objects, in our view, seem opaque. Yet, Dark Nebulas are thought to be the sites where dust clouds concentrate, thus being sites where star formation may occur.
Therefore, Nebulas do not only serve as beautiful, entertaining pictures in the night sky, they also serve an important role in the production of new stars, thus extending the life span of our universe.