最近,美国宇航员正在完成这样的设想:“我们把卫星拿在手中,修理它,再把它送入轨道。”今年4月11日,美国“挑战者”号航天飞机成功地对卫星进行了修复工作,并使其重新进入轨道,在距地球308英里的太空中绕地球运行。一种与强大的太阳耀斑有关的阻力,不断地作用于“太阳峰年”卫星;因此,经过一段时间以后,卫星轨道会变得越来越靠近地球。倘若它距地球的距离减少到大约230英 Recently, the U.S. astronaut is completing the scenario: “We took the satellites in their hands, repaired it, and brought it back into orbit.” On April 11 this year, the U.S. Challenger space shuttle was successfully satellites Repair work and get it back on track, orbiting the Earth in space, 308 miles from Earth. A drag associated with powerful solar flares continues to act on the “solar year” satellites; as a result, satellite orbits become closer and closer to Earth over time. If its distance from Earth is reduced to about 230 inches