Multiple Choice
Cygnus X-1 and LMC X-3 are binary systems with one component not visible.What must the unseen component masses be for astronomers to be certain that these systems contain a black hole?
A) less than 0.4 solar masses
B) between 0.4 and 1.4 solar masses
C) less than 5 solar masses
D) more than 5 solar masses
Correct Answer:

Verified
Correct Answer:
Verified
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