论文部分内容阅读
火星的自然环境与地球最相似,是太阳系中唯一经改造后适合人类长期居住的天体。20世纪,我们实现了载人登陆月球,人类第一次有能力登陆除地球外的另一个天体;21世纪的上半叶,人类很可能将实现载人登陆火星的梦想。虽然科技发展日新月异,但人类面临的命运却十分脆弱,我们面临的重大自然灾难除了地震、火山、海啸外,还包括小天体撞击、地球磁极倒转、
Mars’s natural environment and the Earth’s most similar to the solar system is the only adapted long-term human living objects. In the 20th century, we achieved the manned landing on the moon, the first time mankind has the ability to land another planet except Earth; in the first half of the 21st century, mankind is likely to realize the dream of manned Mars on land. Despite the rapid development of science and technology, the fate of mankind is extremely fragile. In addition to earthquakes, volcanoes and tsunamis, the major natural disasters we face include the impact of small celestial bodies, the reversal of the Earth’s magnetic poles,