Explain Kepler’s first (Law of Orbits) law for planetary motion.
Explain Kepler’s first (Law of Orbits) law for planetary motion.
Law of Orbits :
All planets move in elliptical orbits with the sun situated at one of the foci of the ellipse.
An ellipse traced out by a planet around the sun. The closest point is $P$ and farthest point is $A$. $P$ is called the Perihelion and $\mathrm{A}$ the aphelion. The semi major axis is half the distance $AP$.
This law was a deviation from the Copernican model which allowed only circular orbits. (The ellipse of which the circle is a special case is a closed curve).
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- [AIPMT 1994]
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