单词注释

难句剖析

导读诱思

天文学是一门古老而常新的自然科学,其研究对象是宇宙的规律,是研究天体的结构、形态、分布、运行和演化等的学科。 People have always watched the beautiful night sky.Many ancient people of the world closely studied the stars for signs from their gods.The Mayan① and Aztecs of Central America and Mexico built special tall buildings to observe the stars.The ancient people of Egypt,Greece,Italy,and China also studied the stars.The people who lived on the islands of the Pacific used the stars to find their way across huge areas of ocean. People today still look to the stars for information—not about ancient gods,but about the universe.Modern technology has made it possible to see objects in space that are thousands of millions of kilometres away.