| Acronym | Meaning |
 | GC | Globular Cluster |
| HRSI | High-temperature Reusable Surface Insulation |
| VLF | Very Low Frequency |
| SR | Special Relativity |
| USML | United States Microgravity Laboratory |
| ATM | Apollo Telescope Mount (on Skylab) |
| CRAF | Comet Rendezvous/Asteroid Flyby |
| AJ | Astronomical Journal |
| RVSN | Raketniye Voiska Stratigcheskovo Naznacheniya |
| WFPC | Wide Field/Planetary Camera |
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