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Astrobiology > EXOPLANET BIOSIGNATURES > Flashcards

EXOPLANET BIOSIGNATURES Flashcards

1
Q

what are remotely detectable biosignatures

A
  • gaseous
  • surface
  • temporal
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2
Q

what is the strongest biosignature

A

gaseous
- oxidising + reducing gas
- HOWEVER methane and ozone/ 02 abiotically can be produced

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3
Q

what did seager classify biosignatures to be

A
  • redox gradient- energy extraction by- products based on thermodynamics
    high false positive because could be as a result of geological processes
  • biomass
  • secondary metabolic by- products
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4
Q

what biosignatures can be detected on the surface

A
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Astrobiology (19 decks)

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