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On HD 189733b 63 ly awaymethane, water, CO, and carbon dioxide have already been observed (Swain, et al., ApJ 690, L114, (2009)). In addition high altitude haze and energy redistribution (wind) have been seen. |
Signatures of
life in exoplanet atmospheres
Tinetti
notes that the atmosphere for exoplanet HD 189733b
is "too hot for even the hardiest life …
unlikely that cows could survive here!” |
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Signs of intelligence in exoplanet atmospheresin earth atmosphere CO2 up by 35% in industrial times |
For interstellar archaeology want unique cultural signalfreons (chlorofluorocarbons or CFCs), but dumb?“CFCs are a very interesting idea to look for advanced civilizations," per Lisa Kaltenegger. …need exceptionally sensitive telescope. It might be feasible "in the far future with a flotilla of infrared telescopes in space". |
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