( ( In fact ) ( , ( you ( ( ( can actually ) ( `` ( ( weigh '' ) ( ( ( ( ( an object ) , ) ( such ( as ( ( ( ( ( ( a planet ) , ) star ) , ) or ) ( black hole ) ) ) ) ) , ) ( by ( determining ( ( the ( ( distance and ) speed ) ) ( of ( nearby ( orbiting matter ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (PRP you)) (VP (MD can) (ADVP (RB actually)) (VP (`` ``) (VB weigh) ('' '') (NP (NP (DT an) (NN object)) (, ,) (PP (JJ such) (IN as) (NP (NP (DT a) (NN planet)) (, ,) (NP (NN star)) (, ,) (CC or) (NP (JJ black) (NN hole)))) (, ,) (PP (IN by) (S (VP (VBG determining) (NP (NP (DT the) (NN distance) (CC and) (NN speed)) (PP (IN of) (NP (JJ nearby) (NN orbiting) (NN matter)))))))))) (. .)))
In fact, you can actually "weigh" an object, such as a planet, star, or black hole, by determining the distance and speed of nearby orbiting matter.
(ROOT (S (NP (NP (DT The) (JJ tidal) (NNS forces)) (PP (IN near) (NP (JJ black) (NNS holes)))) (VP (VBP are) (ADJP (RB so) (JJ great) (SBAR (S (NP (PRP they)) (VP (MD can) (ADVP (RB actually)) (VP (VB tear) (NP (NN matter)) (PP (IN from) (NP (DT a) (NN companion) (NN star))))))))) (. .)))