CHAPTER 1 HWRoughly how many stars are in the Milky Way Galaxy? A.Which of the following statements does notuse the term light-yearin an appropriate way? 3.A.What is the Sun mainly made of? A.How long would it take to count all the stars in the Milky Way Galaxy at a rate of one 5.star per second? A.How many galaxies are there in the observable universe? 7.false A.What do we mean by the observable universe? the part of the universe that could be observed in principle, including things that 8.