This galleries below contain visible light spectra of stars that I have measured by placing a diffraction grating (RSpec) onto the back end of 8-11" telescopes and recording the spectrum of the diffracted light directly onto a color CCD camera. What can be learned by doing this? Well, the measured spectra can be used to determine the chemical makeup of a star's atmosphere as well as it's surface temperature (and hence it's Spectral Type on the HR diagram). It's an extremely powerful and relatively easy to do technique (using the RSpec software) that is really lots of fun. The first gallery introduces the methods used, and the second contains all of my stellar spectra, ordered by spectral type from hot type O stars to cold type M stars. The other galleries are organized by constellation.
For an ordered list of my measured spectra of more than 50 stars see also this page.