| Acronym | Meaning |
| ESA | European Space Agency |
| MACHO | MAssive Compact Halo Object |
| LEO | Low Earth Orbit |
| TDRS | Tracking And Data Relay Satellite |
| UT | Universal Time |
| SSI | Solid-State Imager / Space Studies Institut |
| EDO | Extended Duration Orbiter |
| SL | (Comet) Shoemaker-Levy / SpaceLab |
| GCVS | General Catalog Of Variable Stars |
| PHA | Physics And Astronomy |