Question: _ _ _ _ _ _ _ _ _ _ _ of the Milky Way Galaxy's mass is in a form which emits electromagnetic radiation,

___________

of the Milky Way Galaxy's mass is in a form which emits electromagnetic radiation, and therefore can be investigated with various forms of telescopes. A

.

About

90 %

.

About

50 %

.

About

10 %

. 0 %,

all the Galaxy

s mass emits some form of light.

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