天文历史年代学 Astronomical chronology
天文学历史 History of Astronomy
天津历史文化研究丛书 tianjin history and culture research series
不论如何，沃尔夫查阅了欧洲各个天文台的所有记录，并把大约100年前的太阳黑子观测历史整理在一起。
Anyway, Wolf went though all records from various observatories in Europe and put together a history of sunspot observations going back about 100 years.
你还可以用一辈子学习天文，用三辈子学习自然历史，用六辈子学习文学。
You can learn astronomy in a lifetime, natural history in three, literature in six.
天文学界拥有历史悠久的传统，就是免费向公众提供所有此类数据。我们希望所有人都像我们一样喜欢这幅图像。
Astronomy has a rich tradition of making all such data freely available to the public and we hope everyone will enjoy it as much as we have.
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