美国预定1989年4月28日发射“麦哲伦”金星探测器,同年11月发射“伽利略”木星探测器,这是美国相隔11年之久又重新恢复发射探测器。连续航行10年以上的“旅行者”探测器于1988年8月接近海王星。“麦哲伦”探测器在航天飞机上绕地球轨道飞行后,加速飞行脱离地球引力,在大约进行240天旅行后到达金星。金星与地球相邻,其大 The United States plans to launch the “Magellan” Venus probe on April 28, 1989 and the Galileo Jupiter probe in November of the same year, the 11th year since the United States resumed its launch probe. The “traveler” probe, which has been in voyages for more than 10 years, approached Neptune in August 1988. After flying around orbiting Earth on a space shuttle, the Magellan probe accelerated its flight from the Earth’s gravity and arrived at Venus after about 240 days of travel. Venus is adjacent to the Earth, its big