| Acronym | Meaning |
 | SEM | Space Environment Monitor |
| RG | Red Giant |
| PLB | Payload Bay |
| S | Spiral (for Galaxies) |
| CRRES | Combined Release/Radiation Effects Satellite |
| RF | Radio Frequency |
| CNES | Centre National D'Etude Spatiales |
| PDE | Particle Dispersion Experiment |
| CETA | Crew And Equipment Translation Aid |
| ROSAT | ROentgen Satellite |
Browse by Letter:
