ACADEMIC DEPARTMENTS AND RESEARCH INSTITUTIONS

• European Organization for Nuclear Research (CERN)
• Fermi National Accelerator Laboratory (Fermilab) 
• Jet Propulsion Laboratory 
• John’s Hopkins University, Applied Physics Laboratory 
• Los Alamos National Laboratory
• Physics Departments Worldwide 
• Space Telescope Science Institute 
• Stanford Linear Accelerator Center (SLAC) 
• USNA Physics Department

GOVERNMENT AGENCIES AND RESOURCES

• European Space Agency (ESA) 
• Fermi National Accelerator Laboratory (Fermilab) 
• Los Alamos National Laboratory
• National Aeronautics and Space Administration (NASA)
  • ADS (NASA Astrophysics Data System) -- A free search system for Astrophysics, Planetary Sciences, and Solar Physics Abstracts.
  • Goddard Space Flight Center 
  • The Hubble Project 
  • Jet Propulsion Laboratory 
  • Space Telescope Science Institute 
• National Institute of Standards and Technology
  • NIST Physical Reference Data
• National Science Foundation
  • Science and Engineering Indicators (Publication Series) 
• Naval Research Laboratory -- Washington, D.C.
• science.gov ("FirstGov for Science")
• Stanford Linear Accelerator Center (SLAC) 
• Office of Naval Research 
• U.S. Naval Observatory
• Astronomical Applications Dept.: Data Services

LIBRARIES AND RESOURCE CENTERS

• Linda Hall Library
• NASA Goddard Library
• Naval Research Laboratory's Ruth Hooker Research Library and Technical Information Center
• U.S. Naval Observatory Library
• Astronomical Applications Dept.: Data Services

PHYSICS AND ASTRONOMY WEB SITES

• Center for History of Physics 
• Encyclopedia Astronautica 
• The Extrasolar Planets Encyclopaedia
• Martindale’s “The Reference Desk”: TheVirtual Physics Center
• The Nine Planets: a Multimedia Tour of the Solar System
• Physics 2000 
• Physics Web
• PhysLINK: the Ultimate Physics Resource
• StarDate Online
• Views of the Solar System 
• Web Physics
• Your Sky 

PROFESSIONAL ASSOCIATIONS AND ORGANIZATIONS

• Acoustical Society of America
  
• American Association for the Advancement of Science
• American Association of Physics Teachers 
• American Astronomical Society
• American Center for Physics
• American Geophysical Union
• American Institute of Physics
• American Physical Society
• Astronomical Society of the Pacific
• International Union of Pure and Applied Physics 
• Institute of Physics
• Optical Society of America OpticsNet
• Resources of Scholarly Societies – Physics