| Acronym | Meaning |
 | IR | InfraRed |
| ZCG | Zeolite Crystal Growth |
| JD | Julian Date; Julian Day (Number) |
| S | Spiral (for Galaxies) |
| LH | Liquid Hydrogen |
| VOIR | Venus Orbiting Imaging Radar |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| SNR | Signal To Noise Ratio / SuperNova Remnant |
| VICAR | Graphics Format Used By JPL |
| HST | Hubble Space Telescope |
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