| Acronym | Meaning |
| RSN | Radio SuperNova |
| TOS | Transfer Orbit Stage |
| TAL | Transatlantic Abort Landing |
| SAO | Smithsonian Astrophysical Observatory |
| MOPITT | Measurements Of Pollution In The Troposphere |
| OAO | Orbiting Astronomical Observatory |
| HH | Hitchhiker |
| M | Messier |
| SOHO | SOlar Heliospheric Observatory |
| GMT | Greenwich Mean Time |