Biosignature · Biosignature Science
Atmospheric Biosignature
Gases in a planet's atmosphere that life could produce and maintain — especially a chemical disequilibrium, like oxygen and methane together, that non-living chemistry would quickly erase. Detected by the spectroscopy of a planet's light.
Highlights
- ›Oxygen and methane together — a chemical disequilibrium
Worlds, missions & methods
Knowledge connections
- Member of groupBiosignature Science
- Associated withSpectroscopy
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
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.