Why did Galileo's observations of Venus help to disprove the geocentric model of the solar system?

Answer 1

Venus shows crescent phase. like Moon.

This is possible only when Venus orbits inside orbit of earth around Sun.>this observation is proof that the Sun is at center

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Answer 2

John Alexander

Galileo's observations of Venus, particularly its phases, supported the heliocentric model proposed by Copernicus. Seeing Venus go through phases similar to the Moon's phases contradicted the geocentric model, which couldn't explain such behavior. This provided evidence that Venus orbits the Sun, not the Earth, supporting the heliocentric model.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.