There Are (Probably) Billions of Earth-Like Planets in the Universe

New research, courtesy of NASA’s Kepler telescope, suggests that there’s no dearth of pseudo-Earths.
 – NOV 4 / 2013.

“When I began searching for exoplanets,” Geoff Marcy told me last year, “everybody said I was crazy.” Back then—in the 1990s, when “planet hunting” was new and, as its name might suggest, somewhat exotic—the notion of finding planets that existed outside our solar system seemed to have as much to do with science fiction as with science. The Times wrote articles noting that “a few skeptics still question whether these objects, called exoplanets, qualify as true planets.”

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