| Acronym | Meaning |
 | MS | Main Sequence |
| CCRS | Canada Centre For Remote Sensing |
| NACA | National Advisory Committee On Aeronautics |
| FRSI | Flexible Reusable Surface Insulation |
| VLBI | Very Long Baseline Interferometry |
| ZHR | Zenith Hourly Rate |
| SL | (Comet) Shoemaker-Levy / SpaceLab |
| MACS | Modular Attitude Control System |
| FIRAS | Far InfraRed Absolute Spectrophotometer |
| DSN | Deep Space Network |
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