Answer Happy

3. A) Show quantitatively that for a body in interplanetary space, the balance of gravitational force and radiation pressure varies with its size. What is the force on Earth due to the Sun's radiation pressure? How does that compare with the Sun's gravitational force on Earth? (4 marks) B) It has been suggested that radiation pressure from the Sun could be used to propel a large spacecraft toward the outer Solar System. How large a sail would you need to provide an acceleration of 1 m s-² for a 10³ kg spacecraft? (2 marks) C) Quantify the changing effects that solar radiation pressure will have on Earth during the red giant and the asymptotic giant branch stages of the Sun. What does this exercise suggest will be the fate of Earth before the Sun becomes a white dwarf? (3 marks) D) Considering the new information on the composition of the surface and atmosphere of Pluto recently acquired by the New Horizons mission, what would be Pluto's fate during the late evolutionary stages of the Sun? (1 marks)