so you use distance on earth measure to sun

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送交者: sohu 于 2009-03-25, 15:59:00:

回答: 你说的那是以地球公转的直径为基线测的附近恒星周年视差 由 刚柔 于 2009-03-25, 15:53:31:

then, 地球公转直径 to measure to other stars, until the resolution of the telescope can not handle the angle anymore.

they all use same principle, plan and reliable. there has being no fanncy staff involved



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