How did Harlow Shapley discover that our Sun is not at the center of the galaxy?
A) By detecting radio radiation from the galactic center
B) By measuring the orbital speed of the Sun around the galactic center
C) By determining the distribution of globular clusters
D) By comparing our galaxy with the Andromeda galaxy
Correct Answer:
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Q1: What did Harlow Shapley discover about globular
Q3: What kind of star is located at
Q4: The distance to the center of the
Q5: The distance to the center of our
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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