Explanation Given data: The Milky Way galaxy contains about 200 billion stars having masses almost equal to the mass of the Sun. Formula used: The expression for the average density of the galaxy is given as, ρ = N m V Here, m is the mass of each star, which is approximately equal to the mass of the Sun, N is number of stars in the galaxy, V is the volume of the Milky Way galaxy. Explanation: The additional information required to solve this question is: 1. The volume of the Milky way galaxy which is considered as approximately 6.66 × 10 60 m 3 . 2. The mass of the Sun which is considered as 2 × 10 30 kg . Assume that the mass of the planets, asteroids, and gases is just negligible as compared to the mass of the stars. Recall the expression for the average density of a star in the Milky Way galaxy. ρ = N m V Substitute 200 billion for N , 6.66 × 10 60 m 3 for V , and 2 × 10 30 kg for m

2nd Edition

ISBN: 9780134601823

Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan

Publisher: Pearson,

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Chapter 25, Problem 41GP

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The average density of the Milky Way galaxy by assuming that it contains about 200 billion stars having masses almost equal to the mass of the Sun, the information needed, and assumptions if made any.

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Chapter 25, Problem 40P

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The average density of the Milky Way galaxy by assuming that it contains about 200 billion stars having masses almost equal to the mass of the Sun, the information needed, and assumptions if made any.

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The average density of the Milky Way galaxy by assuming that it contains about 200 billion stars having masses almost equal to the mass of the Sun, the information needed, and assumptions if made any.

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