( WASP-17b ( ( was ( ( the ( first exoplanet ) ) ( that ( was ( discovered ( to ( be ( ( ( orbiting ( its ( star opposite ) ) ) ( to ( the direction ) ) ) ( ( the star ) ( is rotating ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP WASP-17b)) (VP (VBD was) (NP (NP (DT the) (JJ first) (NN exoplanet)) (SBAR (WHNP (WDT that)) (S (VP (VBD was) (VP (VBN discovered) (S (VP (TO to) (VP (VB be) (VP (VBG orbiting) (NP (PRP$ its) (NN star) (NN opposite)) (PP (TO to) (NP (DT the) (NN direction))) (SBAR (S (NP (DT the) (NN star)) (VP (VBZ is) (ADJP (JJ rotating))))))))))))))) (. .)))
WASP-17b was the first exoplanet that was discovered to be orbiting its star opposite to the direction the star is rotating.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN exoplanet)) (VP (VBZ is) (ADVP (RB often)) (VP (VBN discovered) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ causes) (NP (DT a) (NN star) (S (VP (VP (TO to) (VP (VB move))) (CC or) (VP (TO to) (VP (VB dim))))))))))) (. .)))