History, 12.01.2021 19:00, tatyanaknight122

What was Gan De's contribution to astronomy? O A.
He developed the world's first star catalogue.
B.
He was the first to record a lunar eclipse.
OC.
He was the first to observe planets.
D.
He invented the telescope

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What was Gan De's contribution to astronomy? O A.
He developed the world's first star catalog...