徐光启是明朝著名的科学家。他的一生都在推动中国科学的进步，推动中西文化的融汇与交流。徐光启在天文学、数学、农业科学、机械制造、军事学等领域都卓有建树。他的《农政全书》，与李时珍的《本草纲目》、宋应星的《天工开物》、徐弘祖的《徐霞客游记》，同为明末科学的四大高峰。接下来，我们将用7节课的内容，为你介绍徐光启的生平，以及他在军事、天文学、农学等方面的贡献。
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