( ( A chance ) ( ( ( alignment ( between ( ( ( the Sun ) and ) ( two ( other ( celestial objects ) ) ) ) ) ) ( within ( ( the ( solar system ) ) ( ( in which ) ( ( one body ) ( ( blocks ( ( the light ) ( of ( the Sun ) ) ) ) ( from ( the other ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN chance)) (VP (VBD alignment) (PP (IN between) (NP (NP (DT the) (NNP Sun)) (CC and) (NP (CD two) (JJ other) (JJ celestial) (NNS objects)))) (PP (IN within) (NP (NP (DT the) (JJ solar) (NN system)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (CD one) (NN body)) (VP (VBZ blocks) (NP (NP (DT the) (NN light)) (PP (IN of) (NP (DT the) (NNP Sun)))) (PP (IN from) (NP (DT the) (JJ other))))))))) (. .)))
A chance alignment between the Sun and two other celestial objects within the solar system in which one body blocks the light of the Sun from the other.
(ROOT (S (NP (NP (RB Only) (DT the) (NN sun)) (PP (IN in) (NP (PRP$ our) (JJ solar) (NN system)))) (VP (VBP give) (PRT (RP off)) (NP (PRP$ their) (JJ own) (NN light))) (. .)))
Only the sun in our solar system give off their own light.