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Loading contentThe signs of life and the factors of planetary habitability — atmospheric, surface, chemical, and geological biosignatures, technosignatures, liquid water, energy, and extremophiles.
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| Name | Type | ID |
|---|---|---|
| Atmospheric Biosignature | Biosignature | biosignature:atmospheric-biosignature |
| Biosignature False Positive | Biosignature | biosignature:biosignature-false-positive |
| Chemical Biosignature | Biosignature | biosignature:chemical-biosignature |
| Chemical Building Blocks | Habitability factor | habitability_factor:chemical-building-blocks |
| Energy Source | Habitability factor | habitability_factor:energy-source |
| Extremophiles | Habitability factor | habitability_factor:extremophiles |
| Geological Biosignature | Biosignature | biosignature:geological-biosignature |
| Liquid Water | Habitability factor | habitability_factor:liquid-water |
| Subsurface Ocean | Habitability factor | habitability_factor:subsurface-ocean |
| Surface Biosignature | Biosignature | biosignature:surface-biosignature |
| Technosignature | Biosignature | biosignature:technosignature |
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
European missions, observatories, and space science imagery.