SETI Live: Earth as an Exoplanet

If we are going to search for signs of life on an exoplanet, what should we look for? When it comes to planets that are hosting life, our current sample size is one. Earth. So how could we design a small satellite mission to take whole-Earth spectra in order to measure the temporal variability of spectra from an inhabited planet with illumination phase, rotation (land vs ocean), cloud cover, and season. The data would help improve models of habitable planets, guide analysis of exoplanet atmospheric measurements, and inform instrumentation for future NASA missions to search for signs of life on exoplanets. Join Beth Johnson in discussion with SETI Institute astronomer Douglas Caldwell and REU (Research Experience for Undergraduates) student Jorge Y Coppin-Massanet to hear how they are tackling this challenge.

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