Information Theory Can Help Us Search for Life on Alien Worlds
Briefly

"The approach comes in two steps: after capturing the light from the exoplanet, we use information theory to search for chemicals associated with the presence of life."
"Today, we can best infer an exoplanet's chemical composition by transit spectroscopy: When a planet passes in front of its star, as seen from Earth, the planet's atmosphere absorbs some of its starlight."
Read at www.scientificamerican.com
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