Question

Use the following information for the following two questions: Planet A is located 15 light-years from the center of the Milky Way galaxy. Planet B is located 5,000 light years from the edge of the Milky Way galaxy 15,000 5. If inhabitants of Planet A sent a radio transmission out into space, what is the shortest possible time it would take for the inhabitants of Planet B to receive the signal. a. 10,000 years b. 20,000 years c. 30,000 years d. 50,000 years e. 60,000 years If inhabitants of Planet A sent a radio transmission out into space, what is the longest possible time it would take for the inhabitants of Planet B to receive the signal. a. 20,000 years b. 30,000 years c. 40,000 years d. 60,000 years e. 70,000 years 6. bove are images representing an average star and a spiral galaxy. How would the star be best represented in the image of the galaxy? a. As a tiny dot b. As a medium sized circle c. As a large circle d. It would not be visible on this scale 7. A

Answer 1

Diameter of Milky way = 100,000 ly. For minimum distance. distance b/w A & B = 50,000 - 5 - 1500 = 30,000 ly. For maximum distance. = 50,000 - 5000 + 15,000 = 60,000 ly. \r\n A tiny dot. Galaxy B & Dwarf elliptical Galaxy C are outside Galaxy A.