And that leads to the second reason why the prediction didn't work, because scientists were also assuming that the telescopes they had were sensitive enough to detect the parallax.
می رسيم به دومين دليلی كه چرا پيش بينی جواب نداد، چون فرض دانشمندان بر اين بود كه تلسكوپهایشان به قدر كافی برای ديدن پارالكس حساس است.