This comprehensive resource was developed by James B. Kaler, Professor Emeritus of Astronomy at the University of Illinois. It provides information on more than 150 stars, arranged by spectral class (Dwarf, Subgiant, Giant, Bright Giant, and Supergiant). It describes the stars' locations relative to Earth, their temperatures, eclipse periods, and factual tidbits of interest. Variable stars are also included. Click on "HR Diagram" to view the stars in a Hertzsprung-Russell Diagram.