| Acronym | Meaning |
 | FWHM | Full Width At Half Maximum |
| MEV | Mars Excursion Vehicle |
| STIS | Space Telescope Imaging Spectrometer |
| CM | Center Of Mass |
| FPD | Flight Projects Directorate |
| HIRS | High Resolution Infrared Radiation Sounder |
| VPF | Vertical Processing Facility |
| VTHL | Vertical Takeoff Horizontal Landing |
| TSS | Targeted Search System / Tethered Satellite System |
| IDA | International Dark-sky Association |
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