Oh goodie.
So tell us what the baseline is for the triangle when measuring star distances. How do they determine the baseline?
We measure with light Doc. if you did a little research you might understand such things instead you chose to bury your head in the perverbial sand.
Tell you what go to home depot today and buy an infrared tape measure (they measure with light)
and then check the distances with a standard tape measure in your own house maybe then you won't be so quick to scoff at modern science.
BTW to answer your next question before you ask they use the same principles used in astronomical calculations in the infrared tape measure TRY IT