( ( By ( sheer coincidence ) ) ( ( -LRB- ( ( it ( ( is nothing ) more ) ) -RRB- ) ) ( ( the ( ( Sun and ) Moon ) ) ( ( appear ( ( virtually ( the ( same size ) ) ) ( in ( our sky ) ) ) ) ; ) ) ) )
(ROOT (S (PP (IN By) (NP (JJ sheer) (NN coincidence))) (PRN (-LRB- -LRB-) (S (NP (PRP it)) (VP (VBZ is) (ADVP (NN nothing)) (ADJP (JJR more)))) (-RRB- -RRB-)) (NP (DT the) (ADJP (NNP Sun) (CC and) (NNP Moon))) (VP (VBP appear) (NP (NP (RB virtually) (DT the) (JJ same) (NN size)) (PP (IN in) (NP (PRP$ our) (NN sky))))) (: ;)))
By sheer coincidence (it is nothing more) the Sun and Moon appear virtually the same size in our sky;
(ROOT (S (NP (NP (DT The) (NN sun)) (CC and) (NP (DT the) (NN moon))) (VP (VBP appear) (S (VP (TO to) (VP (VB be) (PP (IN about) (NP (NP (DT the) (JJ same) (NN size)) (PP (IN in) (NP (DT the) (NN sky))))) (SBAR (IN because) (S (NP (DT the) (NN moon)) (VP (VP (VBZ is) (ADJP (JJR smaller)) (PP (IN in) (NP (NN diameter)))) (CC and) (VP (VBZ is) (ADJP (ADJP (JJR closer)) (PP (TO to) (NP (NN earth)))) (PP (IN than) (NP (DT the) (NN sun))))))))))) (. .)))