| Acronym | Meaning |
 | AOA | Abort Once Around (shuttle Abort Plan) |
| CHARA | Center For High Angular Resolution Astronomy |
| ET | Ephemeris Time |
| APT | Automatic Photoelectric Telescope |
| MOL | Manned Orbiting Laboratory |
| ACRIM | ACR Irradiance Monitor |
| RCI | Rodent Cage Interface |
| CPCG | Commercial Protein Crystal Growth |
| GAS | Get-Away Special |
| M | Messier |
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