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Newton/Kepler

TermDefinition
Eccentricity ratio of the distance between the foci to the length of the major axis; defines the shape of a planet's elliptical orbit.
Weight A measure of the gravitational force exerted on an object. Equals mass x gravity
Mass A measure of the amount of matter in an object.
Acceleration The rate at which velocity changes
Gravity A force of attraction between objects that is due to their masses.
Ellipse is a curve in a plane surrounding two focal points and the oval shape of the planets orbit.
Perihelion orbital point nearest the sun
Aphelion point in a planet's orbit that is farthest from the sun
Kepler German mathematician, astronomer, and astrologer. A key figure in the 17th century scientific revolution, he is best known for his laws of planetary motion
Law of Ellipses Kepler's 1st law: The path of each planet is an ellipse with the Sun at one focus point.
Law of Equal areas A line drawn from a planet to the Sun sweeps out equal areas in equal intervals of time.
Law of Harmonies Kepler's 3rd law which compares the orbital period and radius of the orbit of a planet to those of other planets.
Orbit The path one object takes around another. (goes around)
Newton’s First Law An object at rest will remain at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton’s Second Law Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object)
Newton’s Third Law For every action, there is an equal and opposite reaction.
Created by: Smosel
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