American Astronomical Society

The American Astronomical Society (AAS), established 1899, is the major organization of professional astronomers in North America. The basic objective of the AAS is to promote the advancement of astronomy and closely related branches of science. The membership (~6,500) also includes physicists, mathematicians, geologists, engineers and others whose research interests lie within the broad spectrum of subjects now comprising contemporary astronomy. In 2009, the AAS will lead the US celebration of the International Year of Astronomy. Details may be found at http://www.astronomy2009.us/