与此同时，还要设法判断慧核（最明亮的部分）的亮度，观察一下慧尾有多远。
At the same time try to judge the brigheness of its nucleus(brightest part), and see how far you can trace its tail .
与此同时，还要设法判断慧核（最明亮的部分）的亮度，观察一下慧尾有多远。
At the same time try to judge the brigheness of its nucleus(brightest part), and see how far you can trace its tail .
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