Connections to other Space/Astronomy Societies

National Space Society

These guys are active in going back to the Moon.

The Planetary Society

American Institute of Physics

American Astronomical Society

American Physical Society

European Physical Society

Optical Society of America

The Astronomical Society of the Pacific

Washington Area Astronomers' Home Page

American Geophysical Union

The Geological Society of America

Interstellar Propulsion Society

The Society of Amateur Radio Astronomers

The Society for Scientific Exploration

The Mathematical Association of America

The Americal Mathematical Society

International Dark-Sky Association

New England Light Pollution Advisory Group (NELPAG)

Astronomy Clubs in the US, sorted by state

(Link is from Dan Murry's New Star Gazers' Home Page)