All this tells that our visitor is from outside our solar system, since none of our suns planets, besides the earth, is capable of supporting intelligent life. It also tells us something else: our space visitor is a good bit more advanced than we are.
Whether it is because his race is more intelligent, or just because Planet X is older than the earth and he has had more time to develop, we cannot tell. But the fact is that he has come from outer space. The nearest star system to us is Alpha Centauri, four light-years away. So our visitor has come a minimum of four light-years. Our science, just on the edge of interplanetary flight, couldnt even begin to tackle such an interstellar voyage. We would have a lot to learn from such a visitor.
【四六级阅读的每日一练:第31篇】相关文章:
最新
2016-10-18
2016-10-11
2016-10-11
2016-10-08
2016-09-30
2016-09-30