| Abbreviation | Definition |
|---|---|
| SARA | Society of Amateur Radio Astronomers |
| SARA | Southeastern Association for Research in Astronomy |
| SARA | Sub-KeV Atom Reflection Analyzer |
| SARAO | South African Radio Astronomy Observatory |
| SARDS | Solar Active Region Display System |
| SAS | Society for Astronomical Sciences |
| SASI | Sutherland Astronomical Society Incorporated |
| SATC | Space Astronomy Technical Committee |
| SATIMG | Satellite Imaging |
| SB | Spectroscopic Binary |
| SBUV | Solar Blind Ultra- Violet |
| SC | Star Cluster |
| SCAS | Southern Cross Astronomical Society |
| SCCP | Sloan Computational Cosmology Project |
| SCRT | Stockholm Centimetre Radio Telescope |
| SCT | Schmidt Cassegrain Telescope |
| SCUBA | Submillimetre Common User Bolometer Array |
| SD | Space Debris |
| SDAS | Scarborough And District Astronomy Society |
| SDD | Single Dish Data |