| Acronym | Meaning |
 | HDM | Hot Dark Matter |
| ASA | Astronomical Society Of The Atlantic |
| GTO | Geostationary Transfer Orbit |
| AFPRO | Air Force Plan Representative Office |
| CBR | Cosmic Background Radiation |
| SMS | Shuttle Mission Simulator |
| TWTA | Travelling Wave Tube Amplifier |
| LY | Light Year (usu. Ly) |
| RKA | Rossiskoye Kosmicheskoye Agentsvo |
| LSR | Local Standard Of Rest |
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