| Acronym | Meaning |
| WUPPE | Wisconsin Ultraviolet PhotoPolarimter Experiment |
| VTHL | Vertical Takeoff Horizontal Landing |
| ET | Ephemeris Time |
| RGB | Red Giant Branch |
| SIRTF | Space InfraRed Telescope Facility |
| U3P | Union Pour La Promotion De La Propulsion Photonique |
| PVO | Pioneer Venus Orbiter / Protivo-Vosdushniya Oborona |
| PEM | Particle Environment Monitor |
| PHA | Physics And Astronomy |
| UKST | United Kingdom Schmidt Telescope |