百度作业网求一个男人被外星人追赶的英语作文,
来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/06/12 22:58:24
求一个男人被外星人追赶的英语作文,
Scientists are searching for extraterrestrial life in a number of different ways and places.One aspect of this is the search for extrasolar planets,on the basis that an Earthlike planet around a sunlike star might be a good place to look.The first super-Earths have been discovered,and the longer-term goal will be to undertake spectral analysis of the atmospheres of such exoplanets,looking for oxygen,ozone,water and other potential indicators of life.The recent excitement over Gliese 581g brings such work into focus — though even the very existence of this world is now the matter of some debate.
Other scientists believe our best chance of discovering alien life will be a human or robotic mission in our own solar system — probably to Mars — targeted at detecting extraterrestrial microbial life.But the controversy begins with the small but vociferous group of scientists who use radio telescopes to search the sky for a signal from other civilizations.
Other scientists believe our best chance of discovering alien life will be a human or robotic mission in our own solar system — probably to Mars — targeted at detecting extraterrestrial microbial life.But the controversy begins with the small but vociferous group of scientists who use radio telescopes to search the sky for a signal from other civilizations.