AST101H1 Lecture Notes - Lecture 6: Orbital Period, Free Fall, Escape Velocity
13 Oct 2017
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The earth is the centre of the universe. The sun is the center of the universe. The apparent motion of the planets are because the the outer planets. Discovered that planetary orbits are not circles but are a special type of oval called an. C : the distance from each focus to the center of the ellipse. A : the length of the semi-major axis. A planet"s distance from the sun varies during its orbit. 1st law : planets orbit the sun in an elliptical pattern, with the sun at one focus. Perihelion: closest at the point ( near the sun ) Aphelion: farthest at the point ( away from the sun ) Ex. the car is travelling at 60 km/hr. Ex. the car is going due to 60 km/hr. Acceleration : the rate of change of velocity (speed and direction) Ex. the car is changing speed from 0 km/hr to 100km/hr in 9 sec.
