单词：spectroscopic parallax
分光视差
单词：spectroscopic parallax 相关文章
Parallax is a phenomenon by which we can judge the distance to things just by looking at them. Astronomers use parallax to calculate the distance to stars. Do you need a gigantic computer-based observatory to use it? Not at all. Your finger will do n
发表于:2019-03-06 / 阅读(228) / 评论(0)
英语时差8，16
英语时差8，16
Parallax 视差就是从有一定距离的两个点上观察同一个目标所产生的方向差异。从目标看两个点之间的夹角，叫做这两个点的视差，两点之间的距离称作基线。只要知道视差角度和基线长度，就
发表于:2019-03-09 / 阅读(213) / 评论(0)
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英语听力文摘 English Digest