![]() ![]() Therefore, the larger a planet’s orbit, the longer the planet takes to complete it. Kepler’s Third Law Compares the Motion of Objects in Orbits of Different SizesĪ planet farther from the Sun not only has a longer path than a closer planet, but it also travels slower, since the Sun’s gravitational pull on it is weaker. Keplers First Law of Planetary Motion states that planets move around the sun in an ellipse shaped orbit with the sun at the center of the ellipse (see. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. There are actually three, Kepler’s laws that is, of planetary motion: 1) every planet’s orbit is an ellipse with the Sun at a focus 2) a line joining the Sun and a planet. Each planet moves so that an imaginary line drawn from the sun to the planet sweeps out equal areas in equal times, as shown in Figure 7.4. Kepler’s Second Law Describes the Way an Object’s Speed Varies along Its OrbitĪ planet’s orbital speed changes, depending on how far it is from the Sun. At the age of 27, Kepler became the assistant of a wealthy astronomer, Tycho Brahe, who asked him to define the orbit of Mars. ![]() The distance from one focus to any point on the ellipse and then back to the second focus is always the same. KEPLER'S LAW OF PLANETARY MOTION can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of. While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits. A focus is one of the two internal points that help determine the shape of an ellipse. The Sun (or the center of the planet) occupies one focus of the ellipse. The orbit of a planet around the Sun (or of a satellite around a planet) is not a perfect circle. Kepler’s First Law Describes the Shape of an Orbit ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |