| Acronym | Meaning |
 | CEA | Center For EUV Astrophysics |
| PVO | Pioneer Venus Orbiter / Protivo-Vosdushniya Oborona |
| IC | Index Catalog |
| ALDP | Advanced Launch Development Program |
| TDRSS | Tracking And Data Relay Satellite System |
| ISU | International Space University |
| M | Messier |
| HD | Henry Draper Catalog Entry |
| OGO | Orbiting Geosurvey Observatories |
| A&A | Astronomy And Astrophysics |
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