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今年2月1日,美国“哥伦比亚”号航天飞机因发生事故而坠毁,机上7名宇航员全部遇难,一时震惊世界。这是人类航天事业的重大损失,美国全国为之哀悼。人们称遇难的7名宇航员是人类航天史上的英雄。进军宇宙、探索宇宙的奥秘是人类长久以来的梦想。地球的资源是有限的,人类总有一天必须走出自己的摇篮。宇宙航行是一项难度很大、非常复杂、风险很高的伟大事业,必然要出现这样或那样的挫折。尽管如此,从古到今,人类探索宇宙的梦想一
February 1 this year, the United States, “Columbia” space shuttle crashed due to an accident, the plane all seven astronauts killed, temporarily shocked the world. This is a major loss to the cause of mankind in space and the United States laments its condolences. The seven astronauts who said they were killed were heroes in the history of human spaceflight. Into the universe, to explore the mysteries of the universe is a long-standing dream of mankind. The resources of the earth are limited, and one day humans must walk out of their cradle. Astronautics is a great undertaking that is extremely difficult, complex and risky. It is bound to have one or the other setbacks. Nevertheless, mankind has explored the dream of the universe ever since