( ( Although ( ( the Sun ) ( is ( ( ( about ( four ( hundred times ) ) ) ( the diameter ) ) ( of ( the Moon ) ) ) ) ) ) ( , ( ( the Moon ) ( ( appears ( to ( ( be ( ( the ( same size ) ) ( as ( the Sun ) ) ) ) ( because ( it ( is ( ( ( ( about ( four hundred ) ) times ) closer ) ( to ( the Earth ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (DT the) (NNP Sun)) (VP (VBZ is) (NP (NP (QP (RB about) (CD four) (CD hundred) (NNS times)) (DT the) (NN diameter)) (PP (IN of) (NP (DT the) (NNP Moon))))))) (, ,) (NP (DT the) (NNP Moon)) (VP (VBZ appears) (S (VP (TO to) (VP (VB be) (NP (NP (DT the) (JJ same) (NN size)) (PP (IN as) (NP (DT the) (NNP Sun)))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (ADJP (ADJP (NP (QP (RB about) (CD four) (CD hundred)) (NNS times)) (JJR closer)) (PP (TO to) (NP (DT the) (NN Earth))))))))))) (. .)))
Although the Sun is about four hundred times the diameter of the Moon, the Moon appears to be the same size as the Sun because it is about four hundred times closer to the Earth.
(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))))))))))) (. .)))