We analyse the original cosmology of P. Jordan through his 1939 key paper entitled “Bemerkungen zur Kosmologie" or “Comments on cosmology". In this almost forgotten work, the author introduced a model of dynamical cosmology with spontaneous creation of matter, based on the Large Numbers study, initiated by Eddington and further developed by Dirac. Jordan’s will to explore heuristically all possible cosmological models in order to be prepared in case of surprising future astronomical data is very compelling in this article. Since we think it is wise to learn from our predecessors and from the unsuccessful theories that were later left behind, the present article also offers an overview of Jordan’s work during the 1930s through the analysis of a series of some of his other original pieces. An English translation of Jordan’s key paper can be found in the appendix.

中文翻译：

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评乔丹的宇宙学模型

我们通过1939年发表的题为“ Bemerkungen zur Kosmologie”或“宇宙论评论”的关键论文来分析约旦的原始宇宙论。。在这项几乎被遗忘的工作中，作者基于由爱丁顿（Eddington）发起并由狄拉克（Dirac）进一步发展的大型数字研究，引入了具有自发创造物质的动态宇宙学模型。乔丹将探索性地探索所有可能的宇宙学模型，以便在未来的天文数据令人惊讶的情况下进行准备的意愿在本文中非常具有说服力。由于我们认为向我们的前任和后来失败的理论学习是明智的，因此本文还通过分析约旦其他一些原创作品来概述约旦在1930年代的工作。约旦关键文件的英文翻译可以在附录中找到。