...of a planet is an ellipse with the sun (the center of attraction) at a focus. (2) The radius vector from the sun to a planet sweeps out equal areas in equal times. (3) The square of the period of a planet is proportional to the cube of the length of the major axis...

...The 'second law', again proposed in New Astronomy and repeated in the Epitome, states that the line from the Sun to a planet sweeps out equal areas in equal times. Not only do perturbations again make this law no more than an approximation, but it was completely...

...by himself. They were: • The orbits of_planets- are ellipses with the Sun at one focus. • A line from the Sun to a planet sweeps out equal areas in equal times. • The squares of planetary periods in years are equal to the cubes of their mean distances from the...

...and obviously gives the shape of the orbit of a planet around the sun. Second Law. The radius vector, drawn from the sun to a planet, sweeps out equal areas in equal time, i e., its areal velocity (or the area swept out by it per unit time) is constant. This is referred...

...The orbit of each planet in the Solar System is an ellipse with the Sun at one focus. 2 A radial line from the Sun to a planet sweeps out equal areas in equal intervals of time. 3 The square of the orbital period of each planet is proportional to the cube of...

...motion. These are I Each planet describes an ellipse with the Sun in one focus. II The radius vector drawn from the Sun to a planet sweeps out equal areas in equal times. Ill The squares of the periodic times of the planets are proportional to the cubes of the major semi-axes...

...discovered in the early 1600s that: 1 . Planets move on ellipses with the sun at one focus. 2. The line from the sun to a planet sweeps out equal areas in equal times. 3. The period r of a planet's orbit is related to the length a of its semimajor axis by r2 = Ka\ where...

...Even more striking is the correlation established by Kepler's second law, according to which a line from the Sun to a planet sweeps out equal areas in equal intervals of sidereal time. Whenever astronomers and physicists look carefully, they find correlations...

..."The initial tangential velocities V can be determined as follows. Prom Kepler's second law, a line from the Sun to a planet sweeps out equal areas in equal times. The rate of sweeping out area is the areal velocity v. In one period, the line sweeps out the area...

...planet orbits the sun in an ellipse with the sun at one focus • Kepler's 2nd law: A ray directed from the sun to a planet sweeps out equal areas in equal times • Kepler's 3rd law: The square of the period of a planet's orbit is proportional to the cube of that...