Earth is 93 million miles from the Sun. It takes 1yr for Earth to rotate the Sun. In 6 months Earth will be 186 million miles away on the opposite side of the Sun IF EARTH=. and SUN=O What side of EARTH aka .(dot) is day? What side of EARTH is night? Why can i see the Big Dipper every night of every month throughout the year??????????? .------93mil------O------93mil------. Reconcile that's 186 million miles in the opposite direction that we see the Big Dipper! Must be coincidence..lol
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At that distance you are not resolving the size of the star with your sight, but the magnitude of the light they produce. This is different to our sun because we are close enough to experience its size. With stars the distance they can be observed from is dependent on the brightness of the light they produce. For example, if you continued to move away from our sun it would continue to get smaller until it was a pinpoint, somewhere around Jupiter or Saturn, but that pinpoint would still be visible until you were about 56 light years away, such is it's brightness. It's the same principle as flashlights, they can all be the same size, but some have a beam length of 10m while others have a beam that can reach hundreds of metres. It all depends on the brightness of the bulb. Stars are very bright, almost unimaginably so. https://public.nrao.edu/ask/how-can-we-see-stars-in-the-night-sky-when-they-are-so-far-away/
What's the difference of opinion? I can use stellar parallax to measure the distance to stars. I can do that with just a telescope and some patience.
The only thing I need to take on faith is that triangles will always behave like triangles. Do you have a difference of opinion on the properties of triangles?
A triangle upside down, resembles a pussy...