Out of aphelion and perihelion, where is the speed of the earth more and why?
The earth revolves around the sun in an elliptical orbit or by kepler's first law and sun remains at its one focus. the position of earth at P and A at shortest and longest distance are called perihelion and Aphelion respectively. According to the second law of kepler's the areal velocity of planet around the sun is constant. dtdA=2mL=2mr×p=2mr×mv=21r×v hence , if r increases at Aphelion the v decreases and vice-versa at p.
