I How ancient found that sun is too far from earth?

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Ancient observations of lunar and solar eclipses contributed to the understanding that the sun is larger than both the Earth and the moon. The nearly point-like shadow of the moon during a solar eclipse indicated that the sun is significantly farther away from Earth. While determining the angle between the sun and moon during a half-illuminated phase could provide insights, the precision required was beyond the capabilities of ancient technology. These methods laid the groundwork for later astronomical measurements. Overall, ancient findings highlighted the vast distances in our solar system.
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is it because lunar eclipse shows that sun is bigger than Earth and moon, and solar eclipse shows that sun is too far because moon's shadow on Earth is almost a point.
 
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See the "History" section of the Wikipedia article on the Astronomical Unit: https://en.wikipedia.org/wiki/Astronomical_unit#History

One method of finding the relative distance of the sun and moon is to determine the angle between the sun and the moon at the time when the moon is exactly half illuminated, but doing that accurately was somewhat beyond ancient technology.
 

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