( ( ( ( ( Neptune ( ( ( ( is ( no larger ) ) ( than Uranus ) ) but ) ( is ( much ( further away ) ) ) ) ) , ) so ) ( it ( ( is harder ) ( to see ) ) ) ) . )
(ROOT (S (S (NP (NNP Neptune)) (VP (VP (VBZ is) (ADJP (RB no) (JJR larger)) (PP (IN than) (NP (NNP Uranus)))) (CC but) (VP (VBZ is) (ADVP (RB much) (RBR further) (RB away))))) (, ,) (IN so) (S (NP (PRP it)) (VP (VBZ is) (ADJP (JJR harder)) (S (VP (TO to) (VP (VB see)))))) (. .)))
Neptune is no larger than Uranus but is much further away, so it is harder to see.
(ROOT (S (NP (NNS Uranus)) (VP (VBZ is) (ADJP (RB so) (JJ faint)) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (ADVP (RB far) (RB away)))))) (. .)))