( ( ( ( ( ( Its ( phase angle ) ) ( remains ( constant ( through ( the photosphere ) ) ) ) ) , ) and ) ( ( significant power ) ( is ( obtained ( in temperature ) ) ) ) ) . )
(ROOT (S (S (NP (PRP$ Its) (NN phase) (NN angle)) (VP (VBZ remains) (ADJP (JJ constant) (PP (IN through) (NP (DT the) (NN photosphere)))))) (, ,) (CC and) (S (NP (JJ significant) (NN power)) (VP (VBZ is) (VP (VBN obtained) (PP (IN in) (NP (NN temperature)))))) (. .)))
Its phase angle remains constant through the photosphere, and significant power is obtained in temperature.
(ROOT (S (PP (IN During) (NP (NN phase) (NN change))) (, ,) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (DT a) (NN system)))) (VP (VBZ remains) (ADJP (JJ constant))) (. .)))