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Oxegen signature of a planet's atmosphere

  1. Oct 14, 2007 #1
    Oxygen signature of a planet's atmosphere

    How far away from earth might the oxygen signature of our atmosphere be spectographically detectable? The flip side is how far away might an exo-terrestrial planet's atmospheric oxygen signature be detectable? Also then this would be the distance at which any visiting simple (to re-build) mini-robotic craft (with a spectographic capability) could survey it's environment. Hence a fast and easy way of surveying for life; for our planet, over 2 billion years of exposure.

    see Fermi paradox and Von Neumann probes
    http://en.wikipedia.org/wiki/Fermi_Paradox
    http://en.wikipedia.org/wiki/Exoplanets
     
    Last edited: Oct 15, 2007
  2. jcsd
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