9. How did the ancient astronomers discover that Mercury and Venus are planets not stars? *
A. They noticed that Mercury and Venus are bigger compared to the others stars.
B. They noticed that the constellations’ positions in the night sky vary depending on the time of the year.
C. They noticed that the stars change positions periodically. But there are very bright stars in a fixed position with respect to each other.
D. They noticed that the stars are in a fixed position with respect to each other. But there are very bright stars that change positions periodically.
A. They noticed that Mercury and Venus are bigger compared to the others stars.
B. They noticed that the constellations’ positions in the night sky vary depending on the time of the year.
C. They noticed that the stars change positions periodically. But there are very bright stars in a fixed position with respect to each other.
D. They noticed that the stars are in a fixed position with respect to each other. But there are very bright stars that change positions periodically.
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Answer:
The answer is ↓↓↓↓
C PO TAMANG SAGOT
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