高中地理第一章《地球在宇宙中》第一节“天体和天体系统”中 ,有幅“九月星空图” ,这幅图看似简单 ,却一直是课堂教学中的难点。现代教育理论认为 ,教学难点的突破 ,主要是看学生是否理解 ,取决于学生自己通过对原有知识的重组和改造 ,实现新知识的建构。本文通过示意图分析 There is a “September sky map” in the first section of “Geography of the universe” in the first chapter of “Geography in the Universe” in High School Geography. This picture may seem simple, but it has always been a difficult task in classroom teaching. Modern education theory believes that breakthroughs in teaching difficulties are mainly based on whether students understand or not, depending on the students’ own reconstruction and transformation of the original knowledge and the construction of new knowledge. This article analyzes the diagram