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## Main Question or Discussion Point

i was just thinking , a planet comes close to a very massive star but doesn't collide .how can i calculate the its angular deflection.?

i can calculate the velocity afterwards the deflection(given the initial and final perpendicular distances of its course from center of the star) using angular momentum principle,but how can i predict the behavior of the planet during such an event?

i am considering the planets and stars to perfectly spherical.

no idea how to start.

i can calculate the velocity afterwards the deflection(given the initial and final perpendicular distances of its course from center of the star) using angular momentum principle,but how can i predict the behavior of the planet during such an event?

i am considering the planets and stars to perfectly spherical.

no idea how to start.