Multiple Choice
How did the discovery of gravitational lensing affect our knowledge of quasars?
A) It showed that some quasars are located within the Local Group of galaxies.
B) It showed that quasars are located in the halo of the Milky Way.
C) It showed that quasars are much farther away than the distant galaxies that form the gravitational lenses.
D) It proved the existence of super-massive black holes at the centres of active galactic nuclei.
Correct Answer:
Verified
Correct Answer:
Verified
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