Companies
| Amateur Astronomers Association of New York | |
| Amateur Observer's Society of New York | |
| Astronomical Society of Long Island (ASLI) | |
| Battle Point Astronomical Association | |
| Chapel Hill Astronomical and Observational Society | |
| Laramie Astronomical Society & Space Observers | |
| Miami Valley Astronomical Society - Dayton, OH | |
| New Mexico Tech Astronomy Club | |
| North Jersey Astronomical Group | |
| Nuernberger Astronomische Arbeitsgemeinschaft | |
| Penn State Astronomy Club | |
| Peoria Astronomical Society | |
| Seattle Astronomical Society | |
| Shoreline Amateur Astronomical Association | |
| Society of Amateur Radio Astronomers | |
| UC Davis Astronomy Club | |
| University of Illinois Astronomical Society | |
| University of Michigan - Student Astronomical Society | |
| Western Kentucky Amatuer Astronomers | |
| Discovery of a Planetary Orbit Around the Nearby Star 51Pegasi | |
| FITS [nasa.gov] | |
| FITS archive at NRAO | |
| Milky Way System | |
| Milky Way, The | |
| Our Own Galaxy: | |
| Contributions of Women to the United States Naval Observatory: The Early Years | |
| Digital Archive of Historical Astronomy Pictures | |
| Japanese Starlore and Astronomical History | |