( ( ( ( ( It ( is ( on ( ( the ( opposite side ) ) ( of ( ( the Earth ) ( to ( the Sun ) ) ) ) ) ) ) ) and ) , ) ( ( on ( this occasion ) ) ( , ( ( the ( three bodies ) ) ( ( are so ) ( precisely ( aligned ( that ( ( ( the ( Earth 's ) ) shadow ) ( will ( fall ( on ( ( the moon ) ( causing ( a ( lunar eclipse ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ is) (PP (IN on) (NP (NP (DT the) (JJ opposite) (NN side)) (PP (IN of) (NP (NP (DT the) (NN Earth)) (PP (TO to) (NP (DT the) (NNP Sun))))))))) (CC and) (, ,) (S (PP (IN on) (NP (DT this) (NN occasion))) (, ,) (NP (DT the) (CD three) (NNS bodies)) (VP (VBP are) (ADVP (RB so)) (VP (ADVP (RB precisely)) (VBN aligned) (SBAR (IN that) (S (NP (NP (DT the) (NN Earth) (POS 's)) (NN shadow)) (VP (MD will) (VP (VB fall) (PP (IN on) (NP (NP (DT the) (NN moon)) (VP (VBG causing) (NP (DT a) (NN lunar) (NN eclipse)))))))))))) (. .)))
It is on the opposite side of the Earth to the Sun and, on this occasion, the three bodies are so precisely aligned that the Earth's shadow will fall on the moon causing a lunar eclipse .
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (NN earth) (POS 's)) (NN shadow)) (VP (VBZ falls) (PP (IN on) (NP (DT the) (NN moon)))))) (, ,) (NP (DT the) (NN shadow)) (VP (VBZ causes) (NP (DT a) (NN lunar) (NN eclipse))) (. .)))
When earth’s shadow falls on the moon, the shadow causes a lunar eclipse.