| Acronym | Meaning |
 | TOMS | Total Ozone Mapping Spectrometer |
| MTPE | Mission To Planet Earth |
| PN | Planetary Nebula |
| FOLD | Federally-Owned LANDSAT Data |
| VOIR | Venus Orbiting Imaging Radar |
| CIT | Circumstellar Imaging Telescope |
| SNR | Signal To Noise Ratio / SuperNova Remnant |
| VTHL | Vertical Takeoff Horizontal Landing |
| NSO | National Solar Observatory |
| IUE | International Ultraviolet Explorer |
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