However infrequent, however primitive, life’s first criterion is that a habitable body lie at a habitable distance from its star. No matter who’s ultimately right—Black (who believes that we only have proof of planets around pulsars), Marcy (who bets there are “full-fledged” planetary systems around half of all Sun-like stars), or DePoy (who ventures that no more than 10 percent of Sun-like stars have planetary systems resembling our own)—the mere fact of finding planets around other Sun-like stars only marks the beginning of a decades-long quest to find planets that could ultimately harbor life. And depending on the temperature and type of star, the habitable zone can vary wildly.
KeywordsPlanetary System Habitable Zone Planetary Scientist Southwest Research Institute Debris Disk
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- 1.Kasting, James F., planetary scientist, Penn State University. Interviewed on August 5,.1999, at Bioastronomy 99, Hawaii.Google Scholar
- 2.Canup, Robin, planetary scientist, Southwest Research Institute, Boulder, Colorado. Interviewed on March 21, 2001.Google Scholar
- 3.Laskar, Jacques, celestial mechanic, Paris Observatory. Interviewed on January 14, 2000, in Paris.Google Scholar
- 4.Interview with Darren M. Williams, planetary scientist, Penn State, Pennsylvania.Google Scholar
- 5.“One Theory Solves Two Ancient Climate Paradoxes.” Penn State press release (December 14, 1999).Google Scholar