( ( ( ( ( ( ( ( ( ( ( The stars ) , ) planets ) , ) and ) ( larger asteroids ) ) ( are ( spherical ( because ( gravity ( ( crushes them ) ( into ( that shape ) ) ) ) ) ) ) ) , ) and ) ( they ( act ( like ( fluids ( over ( a ( long ( time scale ) ) ) ) ) ) ) ) ) ; )
(ROOT (S (S (NP (NP (DT The) (NNS stars)) (, ,) (NP (NNS planets)) (, ,) (CC and) (NP (JJR larger) (NNS asteroids))) (VP (VBP are) (ADJP (JJ spherical) (SBAR (IN because) (S (NP (NN gravity)) (VP (VBZ crushes) (NP (PRP them)) (PP (IN into) (NP (DT that) (NN shape))))))))) (, ,) (CC and) (S (NP (PRP they)) (VP (VBP act) (PP (IN like) (NP (NP (NNS fluids)) (PP (IN over) (NP (DT a) (JJ long) (NN time) (NN scale))))))) (: ;)))
The stars, planets, and larger asteroids are spherical because gravity crushes them into that shape, and they act like fluids over a long time scale;
(ROOT (S (NP (NNP High) (NNP gravity)) (VP (VBZ explains) (NP (NP (DT the) (JJ spherical) (NN shape)) (PP (IN of) (NP (NNS ceres)))) (, ,) (SBAR (IN once) (S (VP (VBD thought) (S (VP (TO to) (VP (VB be) (NP (DT the) (JJS largest) (NN asteroid))))))))) (. .)))