| Atm - | Amateur Telescope Making | 3606 posts in 1019 threads, 4:1 ratio |
| Astrophotography - | Astrophotography Tips and Techniques | 263 posts in 120 threads, 2:1 ratio |
| Bigbang - | Big Bang - Let's talk about it. | 832 posts in 107 threads, 8:1 ratio |
| Blackholes - | Blackholes - Theories, Discussion, etc. | 6426 posts in 967 threads, 7:1 ratio |
| Blackholes2 - | Blackholes II | 4864 posts in 962 threads, 5:1 ratio |
| Ccd - | CCD Equipment and Techniques | 97 posts in 60 threads, 2:1 ratio |
| Celestron - | Celestron User Group | 437 posts in 156 threads, 3:1 ratio |
| Domes - | Domes - Portable, fixed, etc. | 59 posts in 19 threads, 3:1 ratio |
| Education - | Education - Help share your hobby with others. | 116 posts in 63 threads, 2:1 ratio |
| Eyepieces - | Eyepiece suggestions for telescopes | 508 posts in 147 threads, 3:1 ratio |
| General - | General issues not covered elsewhere | 4571 posts in 1161 threads, 4:1 ratio |
| God - | God & Science Discussion | 31529 posts in 2540 threads, 12:1 ratio |
| Gravity - | Gravity, 'Universal' Glue | 2 posts in 2 threads, 1:1 ratio |
| Meade - | Meade User Group | 928 posts in 310 threads, 3:1 ratio |
| Seti - | Search for ET Intel. | 33 posts in 18 threads, 2:1 ratio |
| Observation_reports - | Share your findings from the field with others | 287 posts in 120 threads, 2:1 ratio |
| Software - | Software for Astronomy discussion | 66 posts in 37 threads, 2:1 ratio |
| Exploration - | Space Exploration | 222 posts in 28 threads, 8:1 ratio |
| Christstar - | Star of Bethlehem | 7 posts in 3 threads, 2:1 ratio |
| Ufo - | UFO findings and discussion | 981 posts in 223 threads, 4:1 ratio |
| Video - | Video Astronomy Tips and Techniques | 3 posts in 1 threads, 3:1 ratio |
| Xephem - | XEphem User Group | 147 posts in 44 threads, 3:1 ratio |
