Which of the following statements describes the mass in the outer part of the Milky Way (beyond the orbit of the sun)?

Question

Quizplus · Accepted Answer

Studies of the mass distribution in the outer part of the Milky Way suggest that it contains a significant amount of dark matter, which emits little or no light. Therefore, option A is the correct statement. Option B is incorrect since recent measurements show that there is mass in the outer parts of the Milky Way. Option C is incorrect as the outer region of the Milky Way has spiral arm structures that gradually become less defined as one moves away from the center. Option D is incorrect because there is no evidence of significant mass loss or evaporation from the outer galaxy.

Which of the Following Statements Describes the Mass in the Outer