航天安全问题再次引发关注美国东部时间2003年2月1日上午9时,美国“哥伦比亚”号航天飞机在结束了为期16天的太空科学试验任务后,返回途中在美国得克萨斯州北部上空解体坠毁,机上7名宇航员全部遇难。“哥伦比亚”号是美国5架航天飞机中正式飞行的第一架,一共升空28次。“哥伦比亚”号航天飞机失事,使航天安全问题再次成为航天界、甚至世界各国广大民众关注的热点。对于事故原因说法不一、尚无定论, Space security issues once again raised concerns Concerning the U.S. Eastern Time At 9:00 on February 1, 2003, the U.S. space shuttle Columbia ended its 16-day space science test mission and returned on the way to collapse over the northern part of the U.S. state of Texas. All seven astronauts on board were killed. Columbia was the first official flight of five U.S. space shuttles, lifting 28 times in total. The crash of “Columbia” space shuttle made the issue of space security once again become a hot spot in the space community and even the general public in many countries in the world. The reasons for the accident vary, there is no conclusion,