| Acronym | Meaning |
 | RNGC | Revised New General Catalog |
| NAS | Numerical Aerodynamic Simulation |
| DRSS | DATA Relay Satellite System |
| GDS | Great Dark Spot |
| S/C | SpaceCraft |
| CV | Cataclysmic Variable |
| MECO | Main Engine CutOff |
| FRSI | Flexible Reusable Surface Insulation |
| KTB | Cretaceous-Tertiary Boundary |
| IGY | International Geophysical Year |
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