| Acronym | Meaning |
| APL | Applied Physics Laboratory (at Johns Hopkins) |
| SPH | Smoothed-Particle Hydrodynamics |
| STSCI | Space Telescope Science Institute |
| IMO | International Meteor Organization |
| GMT | Greenwich Mean Time |
| AAS | American Astronautical Society |
| EURECA | European Retrievable Carrier |
| SEDS | Students For The Exploration And Development Of Space |
| HMC | Halley Multicolor Camera |
| VRM | Venus Radar Mapper |