| Acronym | Meaning |
 | NTR | Nuclear Thermal Rocket(ry) |
| HAO | High Altitude Observatory |
| DSS | Deep Space Station |
| ALEXIS | Array Of Low Energy X-ray Imaging Sensors |
| RMCD | Radaiation Monitoring Container Device |
| GRU | Glavnoye Razvedivatel'noye Upravileniye |
| VLT | Very Large Telescope |
| ETR | Eastern Test Range |
| HRSI | High-temperature Reusable Surface Insulation |
| MSS | Multispectral Scanner |
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