... Credit Copyright: Greg Bacon ( STScI ), NASA Explanation: The last decade saw the profound discovery of many worlds beyond our solar system, but none analogs of our home planet Earth . ... Less massive planets must certainly exist, and yesterday preeminent planet-finders announced the further detection of two more new worlds -- each a potentially smaller, saturn-sized planet. ... Publications with keywords: extrasolar planet - planet - Saturn - planetary system . ... In the Shadow of Saturns Rings ....