abriefhistoryspaceexploration内容摘要：
s. Skylab, America’s first space station, was a humanspaceflight highlight of the 1970s, as was the Apollo Soyuz Test Project, the world’s first internationally crewed (American and Russian) space mission. In the 1980s satellite munications expanded to carry television programs, and people were able to pick up the satellite signals on their home dish antennas. Satellites discovered an ozone hole over Antarctica, pinpointed forest fires, and gave us photographs of the nuclear powerplant disaster at Chernobyl in 1986. Astronomical satellites found new stars and gave us a new view of the center of our galaxy. In April 1981 the launch of the space shuttle Columbia ushered in a period of reliance on the reusable shuttle for most civilian and military space missions. Twentyfour successful shuttle launches fulfilled many scientific and military requirements until January 1986, when the shuttle Challenger exploded after launch, killing its crew of seven. The Challe。阅读剩余 0%
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