| Acronym | Meaning |
 | UPPP | Union Pour La Promotion De La Propulsion Photonique |
| GCVS | General Catalog Of Variable Stars |
| RFNA | Red Fuming Nitric Acid |
| CCSDS | Consultative Committee For Space Data Systems |
| MDSSC | McDonnell Douglas Space Systems Corp |
| ET | Ephemeris Time |
| FPD | Flight Projects Directorate |
| AXAF | Advanced X-ray Astrophysics Facility |
| IAUC | IAU Circular |
| NOCC | Network Operations Control Center |
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