外研版八年级英语下册《We have not found life on any other planets yet》journey to space PPT课件下载，共20页。In the universe, there are many galaxies.galaxy ['ɡæləksɪ]星系the Galaxy 银河系the Milky Wayplanet 行星A planet can’t shine.star 恒星A star can shine.Read Para 3 and answer1. What have scientists discovered?They’ve discovered many other galaxies in the universe.2. Why is it impossible to imagine how large the universe is?Because they are very far away and their light has to travel for many years to reach us.... ... ...关键词：We have not found life on any other planets yet PPT课件免费下载，.PPT格式； 本作品中主体文字及图片可替换修改，文字修改可直接点击文本框进行编辑，图片更改可选中图片后单击鼠标右键选择更换图片，也可根据自身需求增加和删除作品中的内容，源文件无水印。如认为该内容涉嫌侵权，可通过邮件提出书面通知，我们将及时处理。