天空分类
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This provides the basis and premise for sky classification and study sky luminance distribution by information methods.
这为天空分类及利用信息法研究天空亮度分布提供了基础与前提。
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Cannon was known as the "census taker in the sky, " and developed a stellar classification system that became the standard of the Harvard Observatory.
CNN: The historical analogs of brilliant women
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