( ( Their ( optical ( and ( radar observations ) ) ) ) ( ( show ( ( this asteroid ) ( is ( similar ( to ( ( ( carbonaceous ( chondritic meteorites ) ) , ) ( objects ( that ( ( formed early ) ( in ( solar ( system history ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ Their) (JJ optical) (CC and) (NN radar) (NNS observations)) (VP (VBP show) (SBAR (S (NP (DT this) (NN asteroid)) (VP (VBZ is) (ADJP (JJ similar) (PP (TO to) (NP (NP (JJ carbonaceous) (JJ chondritic) (NNS meteorites)) (, ,) (NP (NP (NNS objects)) (SBAR (WHNP (WDT that)) (S (VP (VBD formed) (ADVP (RB early)) (PP (IN in) (NP (JJ solar) (NN system) (NN history)))))))))))))) (. .)))
Their optical and radar observations show this asteroid is similar to carbonaceous chondritic meteorites, objects that formed early in solar system history.
(ROOT (S (NP (NP (NNS Meteorites)) (, ,) (VP (VBN formed) (PP (IN of) (NP (NN split) (NNS asteroids) (CC or) (NN planetary) (NNS rocks)))) (, ,)) (VP (VBP provide) (NP (NP (NNS clues)) (PP (IN about) (NP (PRP$ our) (JJ solar) (NN system))))) (. .)))