| Acronym | Meaning |
 | STSDAS | Space Telescope Science Data Analysis System |
| TRMM | Tropical Rainfall Measuring Mission |
| LOX | Liquid OXygen |
| IRAF | Image Reduction And Analysis Facility |
| ISPM | International Solar Polar Mission |
| ALEXIS | Array Of Low Energy X-ray Imaging Sensors |
| MMT | Multiple Mirror Telescope |
| HDE | Henry Draper Extension |
| IAUC | IAU Circular |
| CCDS | Centers For The Commercial Development Of Space |
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