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一、宇宙中的地球知识梳理总星系(人类目前观测到的宇宙范围)｛河外星系(数10亿个)银河系｛恒星世界(2000多亿颗)太阳系｛其它行星系统地月系｛地球月球1.课标要求:“描述地球所处的宇宙环境,运用资料说明地球是太阳系中一颗既普通又特殊的行星。”(1)天体系统层次(2)太阳系中
I. Knowledge of the Earth in the Universe Combing the total galaxies (the scope of the universe currently observed by humans) {The galaxy beyond the river (numbering 1 billion) The galaxy {The world of stars (Over 200 billion) The solar system {The system of other planetary systems The moon system 1. The Earth’s Moon 1. The curriculum standard requires: “Describe the environment in which the earth lives, and use data to show that the earth is a common and special planet in the solar system.” (1) Levels of the celestial system (2) In the solar system