What is the origin of fast radio bursts?
A) gamma ray bursts
B) active galactic nuclei
C) mergers of black holes
D) Astronomers do not yet understand the origin of these phenomena.
Correct Answer:
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Q108: Observations indicate that BL Lacertae objects are
A)
Q109: The intensity of radiation coming from an
Q110: What is an Einstein ring?
A) arc of
Q111: Quasars, double-radio sources, and BL Lacertae objects
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Q118: Does the presence of an AGN in
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