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Astronomy (天文学) is the oldest science known to man.Thousands of years ago man looked at the stars and wondered about the heavens.But man was limited (限制) by six planets that he could see with his eyes alone.
The Greeks (希腊人) studied astronomy over 2,000 years ago.They could see the size, color, and brightness of a star.They could see its place in the sky.They watched the stars move as the seasons changed.But the Greeks had no tools to help themselves study the heavens.
Each new tool added to the field of astronomy helped man reach out into space. Until there were telescopes (望远镜), man knew a little about the moon.Today, astronomy is a growing science.We have learned more in the last fifty years than in the whole history of astronomy.
The Greeks (希腊人) studied astronomy over 2,000 years ago.They could see the size, color, and brightness of a star.They could see its place in the sky.They watched the stars move as the seasons changed.But the Greeks had no tools to help themselves study the heavens.
Each new tool added to the field of astronomy helped man reach out into space. Until there were telescopes (望远镜), man knew a little about the moon.Today, astronomy is a growing science.We have learned more in the last fifty years than in the whole history of astronomy.
解题思路：
解题过程：
接上文：在过去的五十年里我们所了解的比天文学整个历史所了解的还要多。
最终答案：略
解题过程：
接上文：在过去的五十年里我们所了解的比天文学整个历史所了解的还要多。
最终答案：略