| Acronym | Meaning |
 | RMS | Remote Manipulator System |
| IAU | International Astronomical Union |
| ASCO | Arab Satellite Communications Organization |
| AGN | Active Galactic Nucleus |
| PN | Planetary Nebula |
| BBXRT | Broad-Band X-Ray Telescope |
| NORAD | NORth American Aerospace Defense |
| DSP | Defense Support Program |
| SLAR | Side-Looking Airborne Radar |
| COBE | COsmic Background Explorer |
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