( it ( ( ( was later ) ( used ( to ( describe ( ( the ( careful observation ) ) ( of ( ( sky and ) stars ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP it)) (VP (VBD was) (ADVP (RB later)) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NP (DT the) (JJ careful) (NN observation)) (PP (IN of) (NP (NN sky) (CC and) (NNS stars))))))))) (. .)))
it was later used to describe the careful observation of sky and stars.
(ROOT (S (NP (NN Temperature) (CC and) (NN sky) (NNS conditions)) (VP (VBP are) (ADVP (DT both)) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NN weather))))))) (. .)))