1. What is hydrogen fusion? This process is sometimes called “hydrogen burning.” How is hydrogen burning fundamentally unlike the burning of a log in a fireplace? 2. Using the mass and size of the...

1. What is hydrogen fusion? This process is sometimes called “hydrogen burning.” How is hydrogen burning fundamentally unlike the burning of a log in a fireplace?

2. Using the mass and size of the Sun, calculate the Sun’s average density. Compare your answer to the average densities of the outer planets. (Hint: The volume of a sphere of radius r is 4/3
r³.)