| Acronym | Meaning |
 | APT | Automatic Photoelectric Telescope |
| LPO | La Palma Observatory |
| ADS | Aitken Double Star Catalog |
| STC | Stennis Test Center |
| ACRV | Assured Crew Return Vehicle |
| RGB | Red Giant Branch |
| PMC | Permanently Manned Capability |
| MMCC | Mission Management And Control Centre |
| IDA | International Dark-sky Association |
| MAS | Millimeter-wave Atmospheric Sounder |
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