(S (S (S (VP (VP (VBG Zipping) (ADVP (RB about))) (PP (IN in) (BASENP (DT the) (JJ solar) (NN system))))) (S (BASENP (DT no) (NNP PHAs)) (VP (VBP have) (VP (ADVP (RB yet)) (VP (VBN been) (VP (VBN found) (PP (IN on) (NP (BASENP (JJ direct) (NN collision) (NN course)) (PP (IN with) (BASENP (DT the) (NNP Earth))))))))))) (PERIOD .))