Biology, 09.09.2020 18:01, kpopqueen0

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

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