| 1 | | 24 Park Ave | Bridgewater |  US | | Observatories | (508) 531-2093 | N/A | N/A |
| 2 | | Otter Crest Lp | Cape Foulweather | US | | Observatories | (541) 765-2270 | N/A | N/A |
| 3 | | 1115 Main Bayview Rd | Southold | US | | Observatories | (631) 765-2626 | N/A | N/A |
| 4 | | 2930 E Warren Ave University of Denver | Denver | US | | Observatories | (303) 871-5172 | N/A | N/A |
| 5 | | 2930 E Warren Ave | Denver | US | | Observatories | (303) 871-5172 | N/A | N/A |
| 6 | | 2210 S Fm 973 | Austin | US | | Observatories | (512) 929-1000 | N/A | N/A |
| 7 | | 1365 Ivanhoe Rd | Ely | US | | Observatories | (319) 848-2068 | N/A | N/A |
| 8 | | 3640 Dark Sky Dr | Fort Davis | US | | Observatories | (432) 426-3640 | N/A | N/A |
| 9 | | 1156 Olin-Turville Ct | Madison | US | | Observatories, Races & Competitions | (608) 239-7888 | N/A | N/A |
| 10 | | 5865 Gorsebrook Avenue | Halifax |  CA | | Observatories | (902) 496-8257 | N/A | N/A |
| 11 | | 2225 River Rd | Southbury | US | | Observatories | (800) 368-8954 | N/A | N/A |
| 12 | | 670 Mount Hopkins Rd | Amado | US | | Observatories | (520) 879-4407 | N/A | N/A |
| 13 | | 251 S Ocotillo Ave | Benson | US | | Rv Parks, Observatories | (520) 586-4400 | N/A | N/A |
| 14 | | Eugen-Richter-Turm | Hagen |  DE | | Observatories | +49 2331 590790 | N/A | N/A |
| 15 | | August-Bebel-Str. 196 | Hamburg | DE | | Observatories | +49 40 47193130 | N/A | N/A |
| 16 | | 1 Astronomical Observatory Rd | Shreveport | US | | Observatories | (318) 865-2433 | N/A | N/A |
| 17 | | Am Hangeweiher 23 | Aachen | DE | | Observatories | +49 241 4792170 | N/A | N/A |
| 18 | | Am Höhenberg 31 | Neumarkt i. d. OPf. | DE | | Observatories | +49 9181 45858 | N/A | N/A |
| 19 | | 1429 Greene St | Columbia | US | | Observatories | (803) 777-4180 | N/A | N/A |
| 20 | | Auf der Ludwigshöhe 196 | Darmstadt | DE | | Observatories | +49 6151 51482 | N/A | N/A |
