San Antonio Astronomical Association
Club information, events, astronomy news and issues, and links to related sites.
San Antonio Audubon Society
Conservation and birding club. Includes local birding sites, siting list, and information on meetings and membership.
San Antonio Botanical Garden
Offers educational events, programs, and classes year-round.
Scobee Planetarium
At San Antonio College. Information on public shows and school and continuing education programs.
South West Research Institute
Non-profit applied research and development organization specializing in the creation and transfer of technology in engineering and the physical sciences.