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Date Time Giant Planets Found in Stellar Suburbs In the neighborhood that makes up our solar system, the giant planets-Jupiter and Saturn-reside in the chilly outer regions, while smaller planets tend to orbit closer to the sun. Our planet Earth lives in an intermediate tropical zone well-suited to life. Planet hunters have long wondered: Is this same type of planetary configuration common around other stars throughout our galaxy or are we unique? The best way to find out is to do a census of the planetary denizens of the galaxy. Astronomers began such a census, called the California Legacy Survey, over three decades ago, and are now releasing a new batch of results. One pattern to emerge from the data is that giant planets tend to reside about 1 to 10 astronomical units (AU) from their host stars, a mostly icy region located beyond the temperate zone of a star. An AU is defined as the distance from Earth to our sun, or about 93 million miles.

United statesLick observatoryAndrew howardUniversity of californiaUniversity of hawaiiUniversity of hawaiCalifornia legacy surveyNational science foundationTennessee state universityCalifornia legacyCalifornia legacy survey ia catalogExoplanet science instituteAstrophysical journalLee rosenthalKeck observatoryAutomated planet finder