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Drake Equation

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Astronomy, astrophysics and cosmology

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Looking for Another Earth? Here Are 300 Million, Maybe - The New York Times
https://www.nytimes.com/2020/11/05/science/astronomy-exoplanets-kepler.html
2003 Spitzer Space Telescope (SST)2009 Kepler space telescope 2013 Gaia (spacecraft)2018 Transiting Exoplanet Survey Satellite (TESS)Drake Equation eta-Earth
Please Call Earth. We Still Haven’t Found You. - The New York Times
https://www.nytimes.com/2008/03/02/weekinreview/02overbye.html
Drake Equation