![]() ![]() It has an orbital period of 15 days and 22 hours and an orbital radius of 1,200,000km. ![]() This means that: is a constant for all planets.ĭeriving from previous equations we find: He eventually derived a relationship which is known as his third law: The cube of the average radius is proportional to the square of the orbital period of the planet. Kepler was determined to find a relationship between the period of a planets orbit around the Sun and its average radius that was consistent for all planets. Further to this he concluded for his second law, that a line joining the planet to the Sun would sweep through equal areas in equal periods of time. From these observations, Kepler discovered that the further a planet was from the Sun, the slower it would be moving. Kepler noticed from his analysis of the data that the speed of the planets changed as they orbited the Sun and that a line from the Earth to the Sun would move through different angles in equal periods of time. The orbits of planets are almost circular and hard to distinguish on a scale diagram by eye. Kepler’s first law states that all planets move in elliptical orbits with the sun at one focus and the other focus empty. Whilst Kepler’s work was extensive, his theory is often summarised as three laws which although outdated by Newton’s work, are still of historical significance and interest. Tycho Brahe had made meticulous measurements and observations of the Sun, planets and stars over many years and Kepler was able to use this data to propose a model for the motion of the planets (Tycho Brahe did all his work before the invention of the telescope). Kepler’s Laws of Planetary Motion – Learnīefore Isaac Newton published his work on The Law of Universal Gravitation, which provided a concise theory to explain the orbits of the planets around the Sun, Johannes Kepler had proposed a theory based on the work he inherited from Tycho Brahe. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |