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Guillermo Gonzalez was initially one of three astronomers who proposed the "Galactic Habitable Zone" or GHZ. This is a ring around the center of a galaxy where life as we know it can exist and thrive. Here is a graphic taken from http://www.daviddarling.info/encyclopedia/G/galactic_habitable_zone.html which shows the zone. Whether or not this dove-tailed into Dr. Gonzalez' ID thoughts, there is nothing squishy about this science.