consider the motion of a comet in an elliptical orbit around a star. the eccentricity of the orbit is given by e= 0.20 and the distance between the perhelion and the aphelion is 1.0 × 10^power8
a- find the distances of nearest and farthest approaches of the comet.
b- if the speed of the comet is 81 km/s at perihelion, what is its speed at aphelion?
there is a solution but i cant understand it
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