( ( ( ( ( ( ( Saturn 's ) rings ) ( ( are ( ( bright and ) visible ) ) ( from Earth ) ) ) , ) but ) ( ( ( the rings ) ( around ( the ( other ( three ( ringed planets ) ) ) ) ) ) ( ( were not ) ( seen ( until ( ( ( NASA 's ) ( Voyager spacecraft ) ) ( flew ( by ( in ( the ( 1980 's ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNP Saturn) (POS 's)) (NNS rings)) (VP (VBP are) (ADJP (JJ bright) (CC and) (JJ visible)) (PP (IN from) (NP (NNP Earth))))) (, ,) (CC but) (S (NP (NP (DT the) (NNS rings)) (PP (IN around) (NP (DT the) (JJ other) (CD three) (JJ ringed) (NNS planets)))) (VP (VBD were) (RB not) (VP (VBN seen) (SBAR (IN until) (S (NP (NP (NNP NASA) (POS 's)) (NNP Voyager) (NN spacecraft)) (VP (VBD flew) (PP (IN by) (PP (IN in) (NP (DT the) (CD 1980) (NNS 's)))))))))) (. .)))
Saturn's rings are bright and visible from Earth, but the rings around the other three ringed planets were not seen until NASA's Voyager spacecraft flew by in the 1980's.
(ROOT (S (NP (DT The) (NN voyager) (CD 1) (NN spacecraft)) (VP (VBD visited) (NP (NN saturn)) (PP (IN in) (NP (CD 1980)))) (. .)))