The law of universal gravitation and Satellites and astronauts: Putting it all together
(a) What is the ratio of the gravitational force that Earth exerts on the Sun in the winter and the force that it exerts in the summer? (b) What does it tell you about the speed of Earth during different seasons? (c) How many correct answers can you give for part (a)? Hint: Earth’s orbit is an ellipse with the Sun located at one of the foci of the ellipse.
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