Early 1600-an, German mathematician and astronomer Johannes Kepler analyzes astronomical mathematical data which analyzes the movements of planets about the sun. Kepler's Law emerges from the careful analysis of data collected over several years by his teacher, Tycho Brahe. Kepler's laws of planet motion are three scientific laws describing the motion of planets around the Sun, published by Johannes Kepler between 1609 and 1619
The laws state that:
The orbit of a planet is an ellipse with the Sun at one of the two focal point.
A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.[2]
The ratio of the square of an object's orbital period with the cube of the semi-major of its orbit is the same for all objects orbiting the same primary.
Dua buah satelit A dan B mengelilingi bumi dengan lintasan masing-masing Ra dan Rb dari pusat bumi. Jika ma = mb dan Ra = 4Rb, maka perbandingan Ta dan Tb adalah ….