1.地球——人类的家园寻找地球以外的生命,一直是天文学领域的热门话题,宇宙中除了地球难道就没有其他有生命的星球吗?大家知道,生命需要能量,最明显的能量来自行星及其卫星的恒星。以地球为例,就是太阳。如一首流传很久的歌:“大海航行靠舵手,万物生长靠太阳。”对有生命的行星至少需要存在几十亿年,这样才拥有足够的时间使生命进化,如地球的年龄大约是46亿年,其中生命进化历经11亿年。水是生 1. Earth, the home of humankind, has always been a hot topic in the field of astronomy in search of life outside the earth. Is there no other planet in the universe except the Earth? Everyone knows that life needs energy, and the most obvious energy comes from planets and The stars of its satellites. Take the Earth as an example, it is the sun. Like a song that has been circulating for a long time: “The sea is sailing on the helmsman, and everything grows on the sun.” It takes at least billions of years for a living planet to have enough time to make life evolve, as the age of the earth is about 4.6 billion years, of which life evolved 1.1 billion years. Water is raw