NASA
Nasa: Imagine the Universe: White Dwarfs
Brief description of white dwarfs with respect to their position in the life cycle of stars, the density of white dwarfs, the emissions of white dwarfs, and the temperatures associated with them.
Harvard University
Field Guide to X Ray Sources: Brown Dwarfs
Brown Dwarfs are explained. Includes illustrations.
University of Illinois
University of Illinois: Stars and Constellations: White Dwarf Supernovae
Discusses the formation of the white dwarf and the role this star plays in the formation of a white dwarf supernovae.
California Institute of Technology
Spitzer Science Center: Crystals Around Brown Dwarfs
This image, titled "Planet Clumps and Crystals around Brown Dwarfs" features a chart representing four brown dwarf stars. The text under the image details various specifics about the picture.
NASA
Nasa: Astronomy Picture of the Day: White Dwarf Cocoon
A white dwarf star begins its life by "casting off a cocoon (nebula)that enclosed its former self." There are many links within the text to related topics.
NASA
Nasa Star Child: Stars (Level 2)
This NASA site that explains the notable features of stars and constellations, including medium and massive stars. Many terms are clickable links to definitions. There is also a link to the Level 1 version of this site, which is written...