Associations

• American Astronomical Society
• American Institute of Physics
• Center for History of Physics
• Chemical Heritage Foundation
• European Organization for Nuclear Research (CERN)
• Great Lakes Planetarium Association
• History of Physics Group
• Institute of Physics
• Max Planck Institute for Gravitational Physics
• Materials Research Society: The Materials Gateway
• The Nuclear Physics Group
• The Planetary Society
• Scholarly Societies Project:  Physics
• Society of Physics Students

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Education

• Astronomy Education at the ASP
• BUBL Link - Physics Education
• comPADRE Digital Library
• National Science Foundation Division of Astronomy
• National Science Foundation Division of Physics

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Calendars

• Space Calendar

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History

• Astronomy Timeline
• Center for History of Physics
• ECHO:  Exploring & Collecting History Online
• A History of Mass Spectrometry
• History of Physics Group
• History of Science Society
• Moments of Discovery
• National Atomic Museum
• The Newton Project
• Physics Timeline
• Year 1000: A Legacy of Science & Technology

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Directories

• PEERS
• Physics Departments Worldwide

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Calculators

• Astro-Physical Calculator

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General Sites

• A-Bomb Bibliography
• Antimatter:  Mirror of the Universe
• Apollo Lunar Surface Journal
• ArXiv
• Astrobiology:  The Search for Life
• The Astrobiology Web
• Astronomical Almanac Online
• Astronomy 162: Stars, Galaxies, and Cosmology
• AstronomyDaily.com
• Astronomy Online
• Astronomy Picture of the Day
• Chem 1 Virtual Textbook
• College Physics for Students of Biology and Chemistry
• Contributions of 20th Century Women to Physics
• DC Physics
• Earth System Research Labratory
• Earth Revealed
• Educational Web Sites on Astronomy, Physics, Space Flight, and the Earth's Magnetism
• Einstein Archives Online
• EngAPPLETS
• Eric Weisstein's Treasure Trove of Physics
• Explore Mars Now: Interactive Mars Habitat
• Exploring the Nanoworld
• Fermi National Accelerator Laboratory
• General Relativity Around the World
• Geo-Guide
• Geology of National Parks
• GEONETCast
• Global Change Master Directory
• Global Volcanism Program
• Help for Physics Students
• High Energy Physics Virtual Phonebook
• Hubble:  A View to the Edge of Space
• HubbleSite
• Isaac Newton Group of Telescopes
• ISIHighlyCited.com
• Lowell Observatory
• Mathematics & Physics at the National Academies
• NASA
• NASA Earth Observatory
• NASA Images
• NASA Technical Reports Server
• Milestones of Flight
• Molecule of the Month
• Nine Planets:  A Multimedia Tour of the Solar System
• NIST Physics Laboratory
• NIST Virtual Library:  Physics
• Nobel Prize in Physics
• Observing the Sky
• Online Particle Physics Information
• The Parallax Project
• Particle-Surface Resources on the Internet
• Physclips: Mechanics with Animations and Video Film Clips
• Physics 2000
• Physics Applets
• Physics Central
• Physics Hypertextbook
• Physics Internet Resources
• PhysicsWeb
• PhysLink.com:  Physics & Astronomy Online
• PhysNet
• Planet Quest
• Planetarium at Illinois State University
• Planetary Data System
• Planetary Photojournal
• Science.gov
• SkyView Virtual Observatory
• SLAC Virtual Visitor Center
• Sloan Digital Sky Survey
• Solar System Simulator
• Space at the National Academies
• Space Environment Center
• A Space Library
• Stanford Linear Accelerator Center
• Student Observation Network
• USNO Astronomical Applications Department
• Views of the Solar System
• Web Physics

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Dictionaries

• Dictionaries Reference Desk - Science
• A Dictionary of Quarternary Acronyms and Abbreviations
• On-line Medical Dictionary

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Biographies

• 4000 Years of Women in Science
• African American Faces of Science
• Bright Sparcs: Australian Academy of Science Biographical Memoirs
• Contributions of 20th Century Women to Physics
• Emilio Serge Visual Archive
• Famous Physicists
• NASA Astronaut Biographies
• Nobel Laureates in Physics, 1901-1999
• Who's Who in Atomic and Plasma Physics
• Women in Astronomy:  A Comprehensive Bibliography

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Encyclopedias

• Encyclopedia Astronautica
• Encyclopedia of Earth
• The Extrasolar Planets Encyclopedia

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Career Information

• APS Careers in Physics
• A Career in Astronomy
• Careers Using Physics
• Curious About Astronomy?  Ask an Astronomer:  Careers in Astronomy
• Lycoming College Career Development Center
• A New Universe to Explore:  Careers in Astronomy
• Physics Careers:  Information Archives
• Your Career in Physics (IOP)

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Journal Pre-Prints

• arXiv.org e-Print archive
• Preprints and Eprints
• Science Accelerator
• Science.gov
• University of New Mexico Information Physics Publications Archive

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