十光年 frames the in space that arison. Hence they cause no noticeable 球史趣闻
十光年
1016 light-ye 10 trillion kilometers 光年太阳 he cold glitter of the starry sky onsequence simply of our planets location nex nodest star. Once we have drawn away from the sun, we can recognize that it is one star among many stars, and all distant stars are in some way suns. 全球秘史趣闻
一 光 年， 太 阳
neters 100 billion kilometers 千 亿公 里, 太阳 系 All the sun's planers circulate within the small square. From earth the have always changing pat. they move around the sun on s, mapped by colored lines. 命全球秘史趣闻
一千 亿公 里， 太阳 系
10 ical units 十亿 公里 m of objects too small and faint to make out without telescopic aid is present as well: Asteroids and meteors ply this darkness in the belt between the orbits of Mars and Jupiter 全球秘史趣闻
十亿 公里
oters 亿 公里 进入 人类 活动 空间 Now we se solar system. The green arc is traversed by planet Earth during some six weeks each September and October 全球秘史趣闻
一亿 公里， 进入 人类 活动 空间