Spectroscopy

http://loke.as.arizona.edu/~ckulesa/camp/spectroscopy_intro.htmlFrom this site I found the defined spectroscopy as the dispertian of light into its component colors. It also told me that astronomers use spectroscopy as a way to determines a stars temerature composition and even mass. It is hard to belive that all this is done through the observation of light and its properties, such as wavelength and frequency. Quite a fascinating study if you ask me.