There is no new star formation in the halo of the Milky Way because there is/are no __________ left in the halo.
A. luminous matter.
B. metals.
C. interstellar hydrogen.
D. type II supernova shockwaves.
Answer:C
There is no new star formation in the halo of the Milky Way because there is/are no __________ left in the halo.
A. luminous matter. B. metals. C. interstellar hydrogen. D. type II supernova shockwaves.