Perhaps the first direct confirmation of Newton’s law of gravitation is the reappearance of Halley’s comet. This comet moves in an elliptical orbit around the sun as predicted by Newton. It is at 8.75x107 km and 5.26x109 km from the sun at the perihelion and aphelion, respectively. Find the period of the orbit of Halley’s comet.

Perhaps the first direct confirmation of Newton’s law of gravitation is the reappearance of Halley’s comet. This comet moves in an elliptical orbit around the sun as predicted by Newton. It is at 8.75x107 km and 5.26x109 km from the sun at the perihelion and aphelion, respectively. Find the period of the orbit of Halley’s comet.

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Galileo is often credited with the early discovery of four of Jupiters many moons.The moons orbiting Jupiter follow te same laws of motion as the planets orbiting the sun.One of the moons is called Io - its distance from Jupiter's center is 4.2 units and it orbits Jupiter in 1.8 Earth-days.Another moon is caled Ganymede;it is 10.7 units from Jupiters center. Make a prediction of the period of Ganymede using Keplers law of periods.
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Suppose an asteroid named Sparty has been discovered revolving around the Sun on a circular orbit with radius rs. Calculate the period of Sparty's orbit, in years. DATA for the orbit radii: Earth re 1.50×10¹¹ m; = Sparty rs = 2.75×1011 m; A: 2.482 B: 2.805 C: 3.170 D: 3.582 E: 4.047 OF: 4.574 G: 5.168 H: 5.840 Submit Answer Tries 0/99
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