Halley's Comet Has an Elliptical Orbit Around the Sun with a Period

question 22

Multiple Choice

Halley's comet has an elliptical orbit around the Sun with a period of 76.0 years. At its closest approach (perihelion) it is 8.82 × 10¹⁰ m from the Sun and has a speed of 54.6 km/s. How fast is it moving at its furthest point from the Sun (aphelion) ? The mass of the Sun is 2.00 × 10³⁰ kg and G = 6.67 x 10^-11 N·m²/kg².

• A) 604 m/s
• B) 802 m/s
• C) 1070 m/s
• D) 1540 m/s
• E) 1860 m/s

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