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angular size中文是什么意思

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  • Due to the tidal friction , the moon is receding from us . tens of thousand of years later , the angular size of the moon will be so small that there will be no total solar eclipse anymore
    由于潮汐摩擦作用,月球正逐渐远离地球,数万年后,月球的视直径会变得很小,届时地球上便再不能看到日全食了。
  • The distance measurement in astronomy is very basic , but also very difficult . for example , it is very easy to measure the angular size of a galaxy . but in order to find out its actual size , we have to know the distance between the galaxy and us
    距离的量度是天文学上最基本但亦极困难的工作,例如在宇宙深处的一个星系,我们要量度它的角大小非常容易,但要知道这星系的真正大小,就要同时知道它和我们的距离。
  • People usually think that larger telescope will magnify the object more . the magnification is the ratio of the apparent sizes of the object . for example , if the angular size of the object is one arc minute and through a telescope , its apparent size becomes 30 arc minutes , then we say the magnification is 30
    很多人以为大型望远镜可以把天体放得更大,事实上望远镜要获得很高的倍率是很容易的只要改用较短焦距的目镜便可以了,但就算是大型望远镜,倍率也极少超过500倍,一般都只是使用100至200倍。
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Last modified time:Mon, 11 Aug 2025 00:29:56 GMT

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