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Halley's comet
Halley's comet is in an elliptic orbit about the Sun. The eccentricity of the orbit is 0.967 and the period is 76 years. The mass of the Sun is 2 × 1030 kg, and G = 6.67 × 10-11 N· m2/kg2 .
(a) Using these data, determine the distance of Halley's comet from the Sun at perihelion and at aphelion.
(b) What is the speed of Halley's comet when it is closest to the Sun?
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