Professor Tim Beers describes: The star catalog of the ancient astronomer Ptolemy contained scarcely more than a thousand stars. The modern Sloan Digital Sky Survey contains information on more than two hundred million celestial objects. Ongoing sky surveys, and the even more ambitious plans for the future, will provide information about the structure and history of the Milky Way Galaxy, and about the nature of the universe as a whole.

Location:	Abrams Planetarium [map]
Price:	free
Sponsor:	Dept. of Physics/Astronomy and Abrams Planetarium
Contact:	Mary Gowans gowans@msu.edu 517-355-4676
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