L55-2:From the earth: Greetings
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop. But how would we find such a planet? At present, there is no telescope in existence that is capable of detecting the presence of life. The development of such a telescope will be one of the great astronomical projects of the twenty-first century.
It is impossible to look for life on another planet using earth-based telescopes. Our own warm atmosphere and the heat generated by the telescope would make it impossible to detect objects as small as planets. Even a telescope in orbit round the earth, like the very successful Hubble telescope, would not be suitable because of the dust particles in our solar system.
alternatively /ɔːlˈtɜːrnətɪvli/ (引出第二种选择或可能的建议)要不，或者, 反之
orbit /ˈɔːrbɪt/ 运行轨道
telescope 望远镜
astronomical /ˌæstrəˈnɑːmɪkl/ 天文学的;天文的;
generate /ˈdʒenəreɪt/ 生成;产生;引起
particle /ˈpɑːrtɪkl/ 微粒、粒子
网友评论