从1965年美国发射出第一颗探测太空的“火星”4号宇宙飞船起,到现在已发射了12艘飞船,进行了同样的考察飞行。1976年,美国航空航天局的“海盗”号宇宙飞船首次在火星上降落,成功地搜集了土壤和岩石等一系列的样品,返回地球,拉开了人类进入火星的序幕。 1993年,美国将发射“火星观察者”号无人驾驶飞船,对火星表面进行测绘,并探索火星上是否存在生命的线索。现在人类登 Since 1965, when the United States launched the first spacecraft to detect space on the Mars 4, it has launched 12 spacecraft and conducted the same inspection flight. In 1976, the NASA spacecraft Pirate landed on Mars for the first time. It successfully collected a series of samples such as soil and rock, returned to Earth, and opened the prelude to human beings entering Mars. In 1993, the United States will launch the Mars Observer unmanned spacecraft to map the surface of Mars and explore the existence of clues on Mars. Humankind now