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http://blog.daum.net/mbs4688/10553298 https://www.mk.co.kr/news/it/view/2020/09/968665/ https://www.chosun.com/economy/science/2020/10/13/ 3U6BMLHK3JC3NDX3FSMHOEK7BU/ https://ko.wikipedia.org/wiki/%EB%AA%A9%EC%84%B1 ko.wikipedia.org/wiki/토성 https://www.google.com/search?q=%EC%B2%9C%EC%99%95%EC%84%B1&tbm=isch&ved=2ahUKEwj078zfzZ3tAhVzxosBHR0bDKIQ2-cCegQIABAA&oq=%EC%B2%9C%EC%99%95%EC%84%B1&gs_lcp=CgNpbWcQAzIECCMQJzIECCMQJzICCAAyAggAMgIIADICCAAyAggAMgIIADICCAAyAggAOgUIABCxAzoICAAQsQMQgwE6BAgAEBg6BggAEAoQGFDziQZY0KkGYLisBmgAcAB4AIABeIgB6waSAQMwLjiYAQCgAQGqAQtnd3Mtd2l6LWltZ8ABAQ&sclient=img&ei=FkK-X_SMPPOMr7wPnbawkAo&bih=597&biw=1242#imgrc=-3aKygxkvbDBaM third image ko.wikipedia.org/wiki/해왕성 ko.wikipedia.org/wiki/명왕성의_위성
