| Acronym | Meaning |
 | ARC | Ames Research Center (NASA) |
| ASCO | Arab Satellite Communications Organization |
| VLT | Very Large Telescope |
| VICAR | Graphics Format Used By JPL |
| PEM | Payload Electronics Module |
| ATCS | Active Thermal Control System |
| HRDI | High Resolution Doppler Imager |
| GHA | Greenwich Hour Angle |
| AAVSO | American Association Of Variable Star Observers |
| SDSS | Sloan Digital Sky Survey |
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