( ( My lessons ) ( ( will ( ( give ( ( only ( a ( brief overview ) ) ) ( of ( objects ( in ( our ( Solar System ) ) ) ) ) ) ) ( because ( ( `` ( planetology '' ) ) ( is ( ( ( a specialty ) ( of ( its own ) ) ) ( involving ( ( not only ) ( ( astronomy ( but also ) ) ( chemistry ( , ( ( geology and ) meteorology ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP$ My) (NNS lessons)) (VP (MD will) (VP (VB give) (NP (NP (RB only) (DT a) (JJ brief) (NN overview)) (PP (IN of) (NP (NP (NNS objects)) (PP (IN in) (NP (PRP$ our) (NNP Solar) (NNP System)))))) (SBAR (IN because) (S (NP (`` ``) (NN planetology) ('' '')) (VP (VBZ is) (NP (NP (DT a) (NN specialty)) (PP (IN of) (NP (PRP$ its) (JJ own))) (VP (VBG involving) (NP (CONJP (RB not) (JJ only)) (NP (NN astronomy)) (CONJP (CC but) (RB also)) (NP (NN chemistry) (, ,) (NN geology) (CC and) (NN meteorology)))))))))) (. .)))
My lessons will give only a brief overview of objects in our Solar System because &quot;planetology&quot; is a specialty of its own involving not only astronomy but also chemistry, geology and meteorology.
(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.