| ALH | Alan Hills, specifically used to designate a meteorite found in Alan Hills, Antarctica |
| CAPS | Committee on Astrobiology and Planetary Sciences |
| CoLD | Confidence of Life Detection scale |
| LR | labeled release experiment on Viking |
| NASA | National Aeronautics and Space Administration |
| NExSS | Nexus for Exoplanet System Science, a NASA Research Coordination Network |
| NfoLD | Network for Life Detection, a NASA Research Coordination Network |
| NSF | National Science Foundation |
| IODP | International Ocean Drilling Program |
| PSD | Planetary Science Division of NASA Science Mission Directorate |
| RCN | Research Coordination Network |
| SOC | Science Organizing Committee |
| SSB | Space Studies Board |