What do we know about the geometry of the dark matter distribution in the vicinity of the Milky Way Galaxy?
A) It appears to be a lens-shaped disk like the Galaxy's disk of visible stars,only larger.
B) It 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,which fills all of space.
D) The geometry of the dark matter distribution,like its constituents,is totally unknown at the present time.

Question

Quizplus · Accepted Answer

Studies of the Milky Way's rotation curve and gravitational lensing of background objects indicate that the distribution of dark matter around the galaxy is spherical and extends beyond the visible disk of stars.

What Do We Know About the Geometry of the Dark