The purpose of this study was to analyze the terms of astronomy area used in six convergence science textbooks by 2009 curriculum revision. The results of this study were following; the first, the contents about astronomy occupied about 18.6% account of science contents. There were the terms which all textbooks used, but some terms were not used other text book, and the others were used in only one textbook. And the second, there were some terms of having certain concept which had described differently. It was suggested that it was necessary to the effort to prevent to descript same meaning terms differently and to make guideline for the depth and width of the terms.