( ( This precession ) ( ( is ( ( ( caused ( by ( ( the ( gravitational attraction ) ) ( of ( ( ( the Sun ) and ) ( the Moon ) ) ) ) ) ) , ) ( almost ( like ( how ( ( each ( celestial object ) ) ( controls ( the tides ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN precession)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (DT the) (JJ gravitational) (NN attraction)) (PP (IN of) (NP (NP (DT the) (NNP Sun)) (CC and) (NP (DT the) (NN Moon)))))) (, ,) (ADVP (RB almost) (PP (IN like) (SBAR (WHADVP (WRB how)) (S (NP (DT each) (JJ celestial) (NN object)) (VP (VBZ controls) (NP (DT the) (NNS tides))))))))) (. .)))
This precession is caused by the gravitational attraction of the Sun and the Moon, almost like how each celestial object controls the tides.
(ROOT (S (S (VP (VBG Looking) (ADVP (RB directly)) (PP (IN at) (NP (DT the) (NN sun))))) (VP (MD can) (VP (VB cause) (NP (NN blindness)))) (. .)))