Multiple Choice
What objects did Harlow Shapley use as "signposts" to figure out the extent of the Milky Way Galaxy and the location of its center?
A) thick clouds of cold hydrogen giving off 21-cm radiation
B) globular clusters
C) HII regions
D) dust clouds
E) big arches advertising "billions and billions sold"
Correct Answer:
Verified
Correct Answer:
Verified
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