1014 meters 100 billion kilometers 千亿公里 All the sun's planets circulate within the small square.From earth the planets have always stood out,a few strange bright stars restlessly wandering in a skyful of unchanging pat- terns.Seen here from outside,the planets take on their Copemican aspect;they move around the sun on these nested cllipses,mapped by colored lines. m▣P.C▣m千亿公里