Q. 544.5( 10 Votes )

State and explain Kepler’s laws of planetary notion. Draw diagrams to illustrate these laws.

Answer :

Kepler’s first law: The planets move in elliptical orbits around the sun, with the sun at one of the two foci of the elliptical orbit. This law means that the orbit of a planet around the sun is an ellipse and not an exact circle. An elliptical path has two foci, and the sun is at one of the two foci of the elliptical path.

Kepler’s Second law states that: Each planet revolves around the sun in such a way that the line joining the planet to the sun sweeps over equal areas in equal intervals of time. This means that a planet does not move with constant speed around the sun. The speed is greater when the planet is nearer the sun, and less when the planet is farther away from the sun.


Kepler’s Third Law states that: The cube of the mean distance of a planet from the sun is directly proportional to the square of time it takes to move around the sun.


r3 α T2



Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Get to Know About Kepler's LawGet to Know About Kepler's LawGet to Know About Kepler's Law47 mins
Lakhmir Singh | Part1 (Gravitation)Lakhmir Singh | Part1 (Gravitation)Lakhmir Singh | Part1 (Gravitation)44 mins
Quiz | GravitationQuiz | GravitationQuiz | Gravitation33 mins
Variation of Acceleration due to GravityVariation of Acceleration due to GravityVariation of Acceleration due to Gravity39 mins
NCERT | Do You Feel Force of Attraction?NCERT | Do You Feel Force of Attraction?NCERT | Do You Feel Force of Attraction?58 mins
NCERT | Gravitation (Part1)NCERT | Gravitation (Part1)NCERT | Gravitation (Part1)43 mins
Foundation | All About Satellite MotionFoundation | All About Satellite MotionFoundation | All About Satellite MotionFREE Class
Lakhmir Singh | Gravitation (Part-1)Lakhmir Singh | Gravitation (Part-1)Lakhmir Singh | Gravitation (Part-1)31 mins
Quiz | Kaun Banega  Champion (KBC) GravitationQuiz | Kaun Banega  Champion (KBC) GravitationQuiz | Kaun Banega Champion (KBC) Gravitation33 mins
Get to Know More About Free FallGet to Know More About Free FallGet to Know More About Free Fall45 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses