| Acronym | Meaning |
 | RA | Right Ascension |
| IDA | International Dark-sky Association |
| BFS | Backup Flight System |
| UFO | Unidentified Flying Object |
| CXBR | Cosmic X-ray Background Radiation |
| HMC | Halley Multicolor Camera |
| AAS | American Astronomical Society |
| OPF | Orbiter Processing Facility |
| ZCG | Zeolite Crystal Growth |
| GOMR | Global Ozone Monitoring Radiometer |
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