Figure_3.tif (65.98 kB)
A single realization of the habitability of extrasolar planets over time.
figure
posted on 2013-02-20, 23:01 authored by Samuel Arbesman, Gregory Laughlinvalues for the extrasolar planets are plotted, with those of the upper envelope (maximum for a given year of discovery) indicated in black. The black curve is the logistic best-fit curve of the upper envelope, using a nonlinear model, where and . The horizontal grey line indicates the maximum value of , the presence of an Earth-like habitable planet.