Here are some of my favorite links on astronomy and physics, as well as teaching, outreach, and education research. Thanks to Bryan Mendez for many of the E/PO links. Disclaimer: this is a starting point, not a complete list!
Professional Societies:
American Astronomical Society (AAS) education pages
American Association of Physics Teachers (AAPT)
Astronomical Society of the Pacific (ASP)
Journals Featuring Astronomy Education Research:
Astronomy Education Review
Physical Review Special Topics
American Journal of Physics
PERC Proceedings
Also see Alice Olmstead's "How to Pursue an Astronomy Education Research PhD"
"Astro 101" Discussion Groups and Training Workshops:
Education Workshops at AAS Meetings
NSF New Faculty Workshops
Center for Astronomy Education (CAE)
CIRTL Network
Astrolrnr Listserve
AstroEd_News
Astronomy Education Facebook Group
Public Outreach Resources and Prominent E/PO Groups:
(not including museums, planetaria, science centers, general science outreach groups, etc. of which there are many and are often great E/PO partners)
NASA Wavelength
NASA SMD EPO Workspace
STSci Outreach
Sonoma State
Berkeley Multiverse
Lunar and Planetary Institute
SETI
LASP
CfA
Goddard
Ames
JPL
NOAO
Yerkes Observatory
APL
Activities/Labs:
COMPADRE
University of Colorado Phets
University of Washington Astro 101 Labs Clearinghouse
SDSS Sky Server
Hands-On Universe
Amazing Space Web-Based Activities
Project Clea
WMAP Teacher's Guide to the Universe
Lecture Tutorials for Introductory Astronomy
Learner-Centered Astronomy Teaching: Strategies for ASTRO 101
General Astronomy and Physics Websites:
Hubble Site
How Stuff Works
Astronomy Picture of the Day
Travis Rector's Image Gallery
Planet Quest
Microwave Anisotropy Probe Cosmology 101
Chandra X-ray Observatory
Particle Adventure
NASA Space Science
Imagine the Universe
Star Child
Sea and Sky
NSSDC Photo Gallery
Light and Matter
Specific Topics:
Light:
The Electromagnetic Spectrum
Atoms and Light Energy
Amazing Space: Star Light Star Bright
Solar System:
Build a Model Solar System
Stars:
Stellar Evolution, Chandra Observatory
Supernovae, by the High-Z SN Search team (click on 'public', then on 'What is a supernova?')
Neutron Stars, by Cole Miller
Falling Into a Black Hole, by Andrew Hamilton
Star Formation, IPAC
AAVSO: American Association of Variable Star Observers
Various books by Jim Kaler
Milky Way and Galaxies:
Cambridge Cosmology: Galaxies
Chandra Galaxy Clusters
Cosmology:
Ned Wright's Cosmology Tutorial
NCSA General Relativity
Cambridge Cosmology Public Home Page
The Hipparcos Space Astrometry Mission
HST Cepheid Variables in M100
The Expansion Rate and Size of the Universe
The High-Z SN Search
Supernova Cosmology Project
Sloan Digital Sky Survey (SDSS)
2dF Galaxy Redshift Survey
University of Chicago LSS Simulations
The Virgo Consortium
Deep Lens Survey
Wayne Hu's CMB Tutorial
Max Tegmark's List of CMB Experiments
MACHO
OGLE
The Measure of Cosmological Parameters by Wendy Freedman. It is a scientific paper, but it is not too technical, so those who want to delve into details might find it useful.
The Search for Life in the Universe:
SETI
CA and Carnegie Exo-Planets Search
Cultural Astronomy:
eCUIP Cultural Astronomy
Professional Societies:
American Astronomical Society (AAS) education pages
American Association of Physics Teachers (AAPT)
Astronomical Society of the Pacific (ASP)
Journals Featuring Astronomy Education Research:
Astronomy Education Review
Physical Review Special Topics
American Journal of Physics
PERC Proceedings
Also see Alice Olmstead's "How to Pursue an Astronomy Education Research PhD"
"Astro 101" Discussion Groups and Training Workshops:
Education Workshops at AAS Meetings
NSF New Faculty Workshops
Center for Astronomy Education (CAE)
CIRTL Network
Astrolrnr Listserve
AstroEd_News
Astronomy Education Facebook Group
Public Outreach Resources and Prominent E/PO Groups:
(not including museums, planetaria, science centers, general science outreach groups, etc. of which there are many and are often great E/PO partners)
NASA Wavelength
NASA SMD EPO Workspace
STSci Outreach
Sonoma State
Berkeley Multiverse
Lunar and Planetary Institute
SETI
LASP
CfA
Goddard
Ames
JPL
NOAO
Yerkes Observatory
APL
Activities/Labs:
COMPADRE
University of Colorado Phets
University of Washington Astro 101 Labs Clearinghouse
SDSS Sky Server
Hands-On Universe
Amazing Space Web-Based Activities
Project Clea
WMAP Teacher's Guide to the Universe
Lecture Tutorials for Introductory Astronomy
Learner-Centered Astronomy Teaching: Strategies for ASTRO 101
General Astronomy and Physics Websites:
Hubble Site
How Stuff Works
Astronomy Picture of the Day
Travis Rector's Image Gallery
Planet Quest
Microwave Anisotropy Probe Cosmology 101
Chandra X-ray Observatory
Particle Adventure
NASA Space Science
Imagine the Universe
Star Child
Sea and Sky
NSSDC Photo Gallery
Light and Matter
Specific Topics:
Light:
The Electromagnetic Spectrum
Atoms and Light Energy
Amazing Space: Star Light Star Bright
Solar System:
Build a Model Solar System
Stars:
Stellar Evolution, Chandra Observatory
Supernovae, by the High-Z SN Search team (click on 'public', then on 'What is a supernova?')
Neutron Stars, by Cole Miller
Falling Into a Black Hole, by Andrew Hamilton
Star Formation, IPAC
AAVSO: American Association of Variable Star Observers
Various books by Jim Kaler
Milky Way and Galaxies:
Cambridge Cosmology: Galaxies
Chandra Galaxy Clusters
Cosmology:
Ned Wright's Cosmology Tutorial
NCSA General Relativity
Cambridge Cosmology Public Home Page
The Hipparcos Space Astrometry Mission
HST Cepheid Variables in M100
The Expansion Rate and Size of the Universe
The High-Z SN Search
Supernova Cosmology Project
Sloan Digital Sky Survey (SDSS)
2dF Galaxy Redshift Survey
University of Chicago LSS Simulations
The Virgo Consortium
Deep Lens Survey
Wayne Hu's CMB Tutorial
Max Tegmark's List of CMB Experiments
MACHO
OGLE
The Measure of Cosmological Parameters by Wendy Freedman. It is a scientific paper, but it is not too technical, so those who want to delve into details might find it useful.
The Search for Life in the Universe:
SETI
CA and Carnegie Exo-Planets Search
Cultural Astronomy:
eCUIP Cultural Astronomy