Date: 2010-12-14 17:05:28SETI Astrobiology Fermi paradox Scientific controversies Drake equation Tagged Image File Format Planetary habitability QuickTime Planet Astronomy Planetary science Space | | The Drake Equation R* average star formation rate (yr-1) Fp fraction of stars with planets Ne number of planets (per star) that could support life Fl fraction of planets that could support life that develop life Fi fractAdd to Reading ListSource URL: www.vsp.ucar.eduDownload Document from Source Website File Size: 1,78 MBShare Document on Facebook
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