The distance to the center of our galaxy can be found from
A) The Cepheid variables there
B) The parallax of the black hole located there
C) Radar measurements
D) The distribution of globular clusters in space
Correct Answer:
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Q1: What did Harlow Shapley discover about globular
Q2: How did Harlow Shapley discover that our
Q3: What kind of star is located at
Q4: The distance to the center of the
Q6: We cannot see the other side of
Q7: What property of globular clusters made it
Q8: Interstellar dust grains produce
A)Radio emission at a
Q9: The 21 cm line is emitted by
A)Hydrogen
Q10: The hydrogen in an HII region is
A)In
Q11: Why are HII regions red in color?
A)They
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