英语翻译Scientists think that there has been life on Earth for millions of years.However,we haven't found life on other planets yet.Wny not?The Earth is a planet and it goes around the Sun.None of them has an environment with air,so people and th

Question

英语翻译
Scientists think that there has been life on Earth for millions of years.However,we haven't found life on other planets yet.Wny not?
The Earth is a planet and it goes around the Sun.None of them has an environment with air,so people and things cannot grow.The Sun and its planets are called the solar system.The solar system is a small part of our galaxy.
The stars we see at night are the suns in other solar systems .There are more than 200 billion stars in our galaxy,called the Milky Way,and our Sun is only one of them.
But scientists have discovered many other galaxies in universe.They are a long way away and their light has travelled for many years to reach us.It is hard to understand how large the universe is.
Scientists have sent lost of spacecraft to look at other planets in our solar system,and some spacecraft have gone beyond the solar system.However,no one has discovered any life in speca yet.
But why has no one from other planets sent us a message Have they tried to send information to us With so many stars in the universe,are we alone or is there life out there in space We don't know ...yet.

Answer 1

科学家认为地球上的生命已有数百万年.然而,我们还没有在别的星球上发现生命呢.为什么没有呢?
地球是一颗行星,它围绕着太阳运转.这些行星都没有大气环境,所以人和生物都不能生长.太阳和行星被称为太阳系以外的行星.太阳系是我们星系的一个小部分.
我们在晚上看到的恒星是在其它太阳系里的太阳还有超过2000亿颗星在我们的星系,称为银河,和我们的太阳只是其中之一.
　　但是科学家已经发现到,许多其他星系在宇宙.他们还有很长的路要走,它们的光已经旅行了多年到我们这里.很难理解为什么大宇宙.
　　科学家已经发送太空船的丢失在考虑其他行星在太阳系,有些宇宙飞船已经超出太阳系外.然而,没有人发现任何生活在太空呢.
但为什么没有人来自其它行星向我们发出一个信息在哪里呢?他们曾试图发送信息给我们这么多的星星呢?因为在宇宙中,我们是单独的或有生命在空间吗?我们不知道呢.