Perhaps you think the Earth is big? Consider the sun!  

1. Assume that the radius of the Earth is $4000$ miles. The sun is approximately $109$ times as wide. Find the sun’s radius.

   Answer (a):

   radius $= (4\text{,}000)(109) ≈ 436\text{,}000$ miles

2. The distance between the Earth and the moon is $238\text{,}900$ miles. Compare this distance with the radius of the sun you found in part (a).

   Hint 1(b):

   After comparing the two, you should find that the radius of the sun is almost double the distance of the Earth to the moon.

   Hint 2(b):

   Use $\frac{4}{3}\pi r^3$ to calculate both volumes.

3. If the sun were hollow, how many Earths would fill the inside of it?

   Answer (c):

   $1.295\times10^6$ Earths