What critical measurement did early astronomers use to develop calendars based on the Sun's position?

Question

Edzy · Accepted Answer

The correct answer is the angles of shadows. Early astronomers measured the angles cast by shadows to determine the position of the Sun, which helped in making calendars. The other options do not directly impact calendar creation.

What critical measurement did early astronomers use to develop calendars based on the Sun's position?

What critical measurement did early astronomers use to develop calendars based on the Sun's position?

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