一个国际天文研究小组曾宣布：他们在太阳系之外首次发现了一颗直径和绕恒星运行的轨道与地球十分相似的行星，这对众多天文工作者来讲，将意味着那里也许存在与地球相近的生命形态。在浩瀚深邃的苍穹深处，是否有生命存在呢？在这茫茫无边的宇宙之中，人类是否真的是孤寂的旅行者，而没有类似抑或更具智慧的星河旅伴？(An international astronomical research group announced: they found a planet with the similar diameter and orbit around the fixed start to the earth outside the solar system. For many astronomers, it means there may be a life form similar to the earth. In the vast deep under the sky, whether there is a life? In the vast boundless universe, whether humans are really the lonely travelers and there is no similar or more intelligent galaxy travelling companion?)