A lot of people don't believe in anything. You might be one of them. If you are "exploring" the idea of a flat earth, and refer to a globular earth as being an "assumption," then you are not knowledgeable enough about circumnavigation to realize that Earth's roundness is a fact, not an assumption.
The radius of the Earth is about 6378 km. The distance to the Sun is about 150 million km. This means the angular separation of measurements of the Sun's direction from opposite points on the Earth cannot be more than about 85 microradians. If the sun is closer, it is possible (inevitable) to get much greater separations. So, go get 'em, since you know everything I know about it.
A lot of people don't believe in anything. You might be one of them. If you are "exploring" the idea of a flat earth, and refer to a globular earth as being an "assumption," then you are not knowledgeable enough about circumnavigation to realize that Earth's roundness is a fact, not an assumption.
The radius of the Earth is about 6378 km. The distance to the Sun is about 150 million km. This means the angular separation of measurements of the Sun's direction from opposite points on the Earth cannot be more than about 85 microradians. If the sun is closer, it is possible (inevitable) to get much greater separations. So, go get 'em, since you know everything I know about it.