( ( Since ( ( the effect ) ( is ( so ( small ( in ( the ( solar system ) ) ) ) ) ) ) ) ( , ( it ( ( ( can only ) ( be ( detected ( for ( light ( that ( just ( grazes ( the Sun ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Since) (S (NP (DT the) (NN effect)) (VP (VBZ is) (ADJP (RB so) (JJ small) (PP (IN in) (NP (DT the) (JJ solar) (NN system))))))) (, ,) (NP (PRP it)) (VP (MD can) (ADVP (RB only)) (VP (VB be) (VP (VBN detected) (PP (IN for) (NP (NP (NN light)) (SBAR (WHNP (WDT that)) (S (ADVP (RB just)) (VP (VBZ grazes) (NP (DT the) (NNP Sun)))))))))) (. .)))
Since the effect is so small in the solar system, it can only be detected for light that just grazes the Sun.
(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.