The Fate of Our Sun

1. Based on your knowledge of stellar evolution, what is the fate of our Sun?
    
2. Find how long a planetary nebula, formed by the Sun, would take to reach Earth’s orbit, assuming an expansion rate of 30 km/s. Show your work.
    
3. How long would it take the planetary nebula to expand outside of the solar system? Show your work and give your answers in years. (Note, the solar system is about 80 AU.) 

K.P. Schroder and R. C. Smith (2008) detail the evolution of our Sun in terms of timescales, radius, mass, and surface temperature.