What Do Astronomers Know About the Geometry of the Dark

question 1

Multiple Choice

What do astronomers know about the geometry of the dark matter distribution in the vicinity of the Milky Way Galaxy?

• A) The dark matter appears to be a lens-shaped disk like the Galaxy's disk of visible stars, only larger.
• B) The dark matter appears to be a spherical halo.
• C) Dark matter, including that near the Milky Way Galaxy, appears to be part of a uniform density distribution that fills all space.
• D) The geometry of the dark matter distribution, like its constituents, is totally unknown at the present time.

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