1. Search for Life on Exoplanets
31 October 2016

2. Kepler Planets

3. Kepler Candidates for Life

10. Methane on Mars

12. Earth Spectrum

17. Summary A large fraction (1/5) of stars have Earth-size planets
Kepler has found about 50 planets in the Habitable Zone
To determine if a planet has life (biosphere) look at light from it or visit it (far off!)
IR light reveals temperature and composition
Bio-signatures: compounds that provide evidence of life: O, CH4. dis-equilibrium; vegetation
If no bio-signatures, life is not necessarily absent