In astronomy, Johannes Kepler published his three laws about planetary motion. It is one of the most important things in astronomy. So Kepler gives three laws about planetary motion.
<h3>What is motion?</h3>
Motion is a physical term in physics. If a particle of mass m and affected by some force F then it change its position in many different way. That is the motion of the object. It is a vector quantity.
<h3>What is Kepler's three laws?</h3>
In astronomy, Johannes Kepler published his three laws about planetary motion between 1609 and 1619. This shows about motion describe the orbits of planets around the Sun. So the three motions are shown following,
<u>First law</u>: Every planet in solar system that moves in a elliptical orbits where the sun always in the center of the motion.
<u>Second law</u>: Every planet covers the same amount of distance in a constant time no matter where the orbit of the planet placed. That means the velocity of every planet is not same. It varies along with the orbit. But every time the change of area is constant.
<u>Third law</u>: The orbital period of the planet is proportional with the cube of the semi major axis of the planet. It can be shown mathematically,
p²∝a³
Where we know,
p= The orbital period of the planet.
a= the semi major axis of the planet.
From the discussion we can easily shown that there are three laws of Kepler about planetary motion.
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