英语词汇“BY Dra star”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	BY Dra star
释义	BY Dra star 天龙BY型星; 光谱型为K和M的带发射线的矮星，有准周期光变，光变幅小于 0.5目视星等，周期通常从短于1天至几天，光变曲线的形状在变化，表面有黑子活动。
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