Between 1930 And 2006, Most Astronomers Considered That There Were How Many Planets In Our Solar System?

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Between 1930 And 2006, Most Astronomers Considered That There Were How Many Planets In Our Solar System?

Question:
Between 1930 And 2006, Most Astronomers Considered That There Were How Many Planets In Our Solar System?
a)
Nine
b)
Ten
c)
Eight
d)
Seven

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Correct Answer
Nine
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