Only a small portion of the Milky Way disk is visible to the naked eye because of:
A. the finite speed of light.
B. dark matter.
C. interstellar gas and dust.
D. expanding space.
Answer:C
Only a small portion of the Milky Way disk is visible to the naked eye because of:
A. the finite speed of light. B. dark matter. C. interstellar gas and dust. D. expanding space.