| Acronym | Meaning |
 | NIST | National Institute For Standards And Technology |
| RA | Right Ascension |
| NSO | National Solar Observatory |
| TDT | Terrestrial Dynamic Time |
| PLSS | Portable Life Support System |
| WINDII | Wind Imaging Interferometer |
| WFPCII | Replacement For WFPC |
| ASI | Agenzia Spaziale Italiano |
| UIT | Ultraviolet Imaging Telescope |
| CASSINI | Saturn Orbiter And Titan Probe |
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