( So ( we ( ( can ( say ( that ( ( ( Jupiter and ) ( its ( large moons ) ) ) ( ( ( are ( similar ( to ( ( ( the sun ) and ) planets ) ) ) ) , ) ( like ( ( a ( little ( solar system ) ) ) ( within ( the ( solar system ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (IN So) (NP (PRP we)) (VP (MD can) (VP (VB say) (SBAR (IN that) (S (NP (NP (NNP Jupiter)) (CC and) (NP (PRP$ its) (JJ large) (NNS moons))) (VP (VBP are) (ADJP (JJ similar) (PP (TO to) (NP (NP (DT the) (NN sun)) (CC and) (NP (NNS planets))))) (, ,) (PP (IN like) (NP (NP (DT a) (JJ little) (JJ solar) (NN system)) (PP (IN within) (NP (DT the) (JJ solar) (NN system)))))))))) (. .)))
So we can say that Jupiter and its large moons are similar to the sun and planets, like a little solar system within the solar system.
(ROOT (S (NP (NNP Jupiter)) (VP (VBZ is) (NP (NP (DT the) (JJS largest) (NN planet)) (PP (IN in) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))