what are Kepler 'S 3 laws
Answers
Answer:
Kepler's three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. ... (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.
Answer:
Explanation:
Kepler’s First Law
Kepler’s first law of planetary motion states that the paths of the planets, which revolve around the Sun, is elliptical in shape. The Sun is located at the centre and acts as the focus. The first law is also referred to as ‘The Law of Ellipses.’ It describes that the paths of the planets revolving around the sun is an ellipse.Aphelion is the point on the orbit of the planet farthest away from the Sun; perihelion is the point on the orbit nearest to the Sun.
Kepler’s Second Law
The second law of planetary motion states that a line drawn from the centre of the Sun to the centre of the planet will sweep out equal areas in equal intervals of time. It is, sometimes, also referred to as the ‘Law of Equal Areas.’ It explains the speed with which a planet moves while orbiting around the Sun. The planets do not move at a constant speed. When the planets are closest to the Sun, their speed is more as compared to their speed when the planets are farthest away from the Sun. Hence, we can say that the area swept by the earth in 30 days is constant.
Kepler’s Third Law
Also known as the ‘Law of Harmonies’, Kepler’s third law of planetary motion states that the square of the orbital period (represented as T) of a planet is directly proportional to the cube of the average distance (or the semi-major axis of the orbit) (represented as R) of a planet from the Sun.With the help of Kepler’s third law, we can also compare the motion of different planets. Consider the following example: Hence, it can be concluded that the T2/R3 is almost constant.
The third law of planetary motion is the only law which deals with multiple planets.
