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search result for planetary nebula in English - English (Wordnet) dictionary
planetaryplanetalterrestrialnebular hypothesistycho brahegravity-assistbrahejohan keplerjohannes keplerkeplerextragalactic nebulanebulaplanetary nebulafixed starkepler's law of planetary motionkepler's lawhadean timepriscoanpriscoan aeonhadean eonhadean aeonpriscoan eonnebularextragalacticgalaxyhookerobert hookehadeanptolemaicnebulousglobalerraticwanderingworldwideworld-widesunworld