| Acronym | Meaning |
 | E | Elliptical (for Galaxies) |
| ETE | End-to-End |
| PMT | PhotoMultiplier Tube |
| GC | Globular Cluster |
| CHARA | Center For High Angular Resolution Astronomy |
| LST | Local Sidereal Time |
| SPAN | Space Physics And Analysis Network |
| AGE | Auxiliary Ground Equipment |
| C&T | Communications & Tracking |
| AOCS | Attitude And Orbit Control System |
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