在太阳系的诸多天体中,火星的环境条件更类似于地球。例如,火星的昼夜仅略长于地球的昼夜,类似于地球的四季变化,火星的冰极冠、可能的永冻土都表明存在水资源,而干涸河床表明火星曾有过温暖、湿润的气候。在这些条件下,会存在火星生命吗?当地球不堪重负时,火星能够成为人类的又一家园吗?火星探测的重要目的就是为寻找这些问题的答案。火星“运河”与火星生命1877年,意大利天文学家斯基帕雷利观测到火星上有许多像“水道” In many celestial bodies of the solar system, Mars’ environmental conditions are more similar to Earth. For example, Mars’s day and night are only slightly longer than Earth’s day and night, similar to the four seasons of the Earth. Mars’ ice cap and possible permafrost all indicate the existence of water resources, while the dry river bed indicates that Mars once had a warm and humid climate. Under these conditions, will there be life on Mars? When the Earth is overwhelmed, can Mars become another garden for humanity? The main purpose of Mars exploration is to find answers to these questions. Mars “Canals” and the life of Mars In 1877, Italian astronomer Schiparyli observed that there are many “waterways” on Mars.