Showing 420 results
Subjects| Subjects term | Scope note | Archival description count | Authority record count |
|---|---|---|---|
| Photographic plates | 5 | 0 | |
| Photoheliograph | 4 | 0 | |
| Photoheliographs | 3 | 0 | |
| Photometric and imaging devices | 6 | 0 | |
| Photosphere | 1 | 0 | |
| Plages | 0 | 0 | |
| Planetary nebulae | 0 | 0 | |
| Planets | 2 | 0 | |
| Planning commission | 2 | 0 | |
| Pleiades | 0 | 0 |