kEPLER'S lAWS
Johannes Kepler developed the following laws on the positon of the solar system and the movement of all planets.
Kepler's First Law- Each planet orbits the sun in an ellipse instead of a circle. An ellipse is an oval shape that is centered in on two points instead of one. The two points are called foci. Each planet has a different elliptical orbit and the sun is always the focus. The average distance between the sun and the planet is measured in astronomical units (AU)
Kepler's Second Law- An imaginary line exists between the sun and the planet and the planet sweeps out equal amounts of area in equal amounts of time.
Kepler's Third Law- Kepler developed a mathematical equation relating the size of the planet's ellipse and its orbital period. The P stands for the unit of time measured in Earth years and a is the unit of length measured in AU.
Kepler's First Law- Each planet orbits the sun in an ellipse instead of a circle. An ellipse is an oval shape that is centered in on two points instead of one. The two points are called foci. Each planet has a different elliptical orbit and the sun is always the focus. The average distance between the sun and the planet is measured in astronomical units (AU)
Kepler's Second Law- An imaginary line exists between the sun and the planet and the planet sweeps out equal amounts of area in equal amounts of time.
Kepler's Third Law- Kepler developed a mathematical equation relating the size of the planet's ellipse and its orbital period. The P stands for the unit of time measured in Earth years and a is the unit of length measured in AU.
(Picture from http://www-history.mcs.st-and.ac.uk/PictDisplay/Kepler.html)