| Atm - | Amateur Telescope Making | 3593 posts in 1014 threads, 4:1 ratio |
| Astrophotography - | Astrophotography Tips and Techniques | 257 posts in 118 threads, 2:1 ratio |
| Bigbang - | Big Bang - Let's talk about it. | 831 posts in 107 threads, 8:1 ratio |
| Blackholes - | Blackholes - Theories, Discussion, etc. | 6425 posts in 966 threads, 7:1 ratio |
| Blackholes2 - | Blackholes II | 4865 posts in 963 threads, 5:1 ratio |
| Ccd - | CCD Equipment and Techniques | 97 posts in 60 threads, 2:1 ratio |
| Celestron - | Celestron User Group | 431 posts in 152 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. | 112 posts in 61 threads, 2:1 ratio |
| Eyepieces - | Eyepiece suggestions for telescopes | 508 posts in 147 threads, 3:1 ratio |
| General - | General issues not covered elsewhere | 4563 posts in 1153 threads, 4:1 ratio |
| God - | God & Science Discussion | 31849 posts in 2555 threads, 12:1 ratio |
| Gravity - | Gravity, 'Universal' Glue | 1 posts in 1 threads, 1:1 ratio |
| Meade - | Meade User Group | 925 posts in 308 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 | 65 posts in 36 threads, 2:1 ratio |
| Exploration - | Space Exploration | 220 posts in 26 threads, 8:1 ratio |
| Christstar - | Star of Bethlehem | 6 posts in 3 threads, 2:1 ratio |
| Ufo - | UFO findings and discussion | 987 posts in 228 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 |
