英语词汇“Visual binary”字怎么读，Visual binary的拼音、意思释义、用法及组词造句例句翻译-英语翻译词典-学习充电-依恋情感网

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词汇	Visual binary
分类	英语词汇英语翻译词典
释义	Visual binary 原声例句 Crash Course 天文篇 Not bad. Not all binaries are visual binaries, though. 不错的。不过并不是所有的双星都是目视双星。 Crash Course 天文篇 Visual binaries are important, because, if you observe them long enough you might be able to see their orbital motion. 目视双星很重要，因为，如果你观察它们的时间足够长，你也许能看到它们的轨道运动。 Crash Course 天文篇 These kinds of stars are fairly common: the brightest star in the night sky, Sirius, is a visual binary. 夜空中最亮的恒星，天狼星，就是一颗目视双星。 Crash Course 天文篇 In even a small telescope you can see that Mizar is actually a visual binary… but it turns out that both of those two stars making up Mizar are actually SPECTROSCOPIC binaries, too. 即使是用一个小望远镜，你也可以看到开阳星实际上是目视双星… … 但事实证明，组成开阳星的这两颗恒星其实也是分光双星。英语百科 Visual binary A visual binary is a gravitationally bound system that can be resolved into two stars with the aid of a telescope. These stars are estimated, via Kepler's 3rd law, to have periods ranging from a number of years to thousands of years. A visual binary consists of two stars, usually of a different brightness. Because of this, the brighter star is called the primary and the fainter one is called the companion. If the primary is too bright, relative to the companion, this can cause a glare making it difficult to resolve the two components. However, it is possible to resolve the system if observations of the brighter star show it to wobble about a centre of mass. In general, a visual binary is resolved into two stars with a telescope if their centres are separated by a value greater than or equal to one arcsecond.
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