Questions: I'm sorry, but you haven't provided the actual content of the question from the OCR-processed text. Could you please provide the question text for me to assist you further?

I'm sorry, but you haven't provided the actual content of the question from the OCR-processed text. Could you please provide the question text for me to assist you further?

Transcript text: I'm sorry, but you haven't provided the actual content of the question from the OCR-processed text. Could you please provide the question text for me to assist you further?

Solution

Solution Steps

Step 1: Observation of phases of Venus

Observation of phases of Venus: This was first observed during the Early Copernican Revolution (about 1543–1600). Galileo Galilei made this observation, which supported the heliocentric model.

Step 2: Ability to predict planetary positions within a few degrees of arc

Ability to predict planetary positions within a few degrees of arc: This was achieved during the Later Copernican Revolution (about 1600–1630). Johannes Kepler's laws of planetary motion allowed for more accurate predictions.

Step 3: Copernicus proposes Sun-centered model

Copernicus proposes Sun-centered model: This occurred during the Early Copernican Revolution (about 1543–1600). Nicolaus Copernicus proposed the heliocentric model in his work "De revolutionibus orbium coelestium."

Final Answer

Observation of phases of Venus: Early Copernican Revolution (about 1543–1600)
Ability to predict planetary positions within a few degrees of arc: Later Copernican Revolution (about 1600–1630)
Copernicus proposes Sun-centered model: Early Copernican Revolution (about 1543–1600)

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