Click on Blackbody Spectrum Viewer to open a window with an applet designed to show
blackbody spectra with different representations.
This alternate version uses the same technique
to show the appearance of a star of a given temperature, radius, and distance
from the Earth.
Click on Blackbody Spectrum - Photometry to open a window with an applet designed to compare a blackbody spectrum for a star with a given temperature, size, and distance
to astronomical data.