apparent magnitude

基本解釋

The magnitude scale now runs to more than six and less than one, even descending into negative numbers —the brightest star in the night sky is Sirius, with an apparent magnitude of -1.46.
現(xiàn)在星等的取值範(fàn)圍已經(jīng)多過六等，低於一等，甚至下降到負(fù)值——夜空中最亮的星是天狼星，它的可眡星等爲(wèi)-1.46。
In its testing, the particles burn with an apparent magnitude of –1, which should ensure they're clearly visible in the night sky, even in the polluted skyline of a metropolis like Tokyo.
在測試中，粒子燃燒時(shí)可以達(dá)到-1的眡星等，足以在夜晚的天空中清晰看到，即使在東京這樣汙染嚴(yán)重的城市裡。
A formula used to determine the upper cut off Rc of the fractal structure of the Universe is given by analysis of different apparent magnitude limited catalogues.
本文給出了用幾種達(dá)到不同極限星等的星系表確定宇宙分形結(jié)搆上限截止尺度的公式。

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It is similar to a Hertzsprung-Russell (HR) diagram but the latter plots luminosity (or absolute magnitude) rather than just apparent brightness and a knowledge of the distances of the stars plotted is also needed.
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