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OCR: ORBITS Accor ding to the law of Conser ration of Momen' tum objec will cont inue ctraight Tirre cons Ue speed unless some force acts upon to alter that course (A) When object nears a planet its course ben towards the planet bi the pull gravity (B If the avitational force sufficiently strong the ob iects course will be cont tinually wrapped around the planet (c This called an Orbit Orbit Shapes When planet orbit around sun the shape of its orbit forms ellipse D Circular orbits E also pos: sible ae they ellipses with zero eccentricity planet's velocity is just qroa enough escape the gravitational pull of the sun (escape velocity) path will be para abola F which an ellipse with infinite length Speeds above escape velocity form hyperbola (G tant unles objects cour continually puno theu plane a ...