材料美学微观美 宁月生
材料美学-微观美 宁月生
材料的微观美 宏微观的统一：全息美
材料的微观美 宏微观的统一：全息美
102mter 1 blllion light-years 十亿光年 Most of space looks as cmpty as this,the glow of distant galaxies like douted dust.This emptiness is normal;our own bright home-world is the exception.A tenfold larger view would show no new structure,no new void;the universe is roughly uniform at such di. mensions.Novelty on so grand a scale is to be sought over time rather than from place to place.All swift change is in the past.This view will dim slowly,for a few billion years at east,as the faint dlusters drift still farther apart. m▣P.▣m
十亿光年
1024 eters ~100 million light-years 亿光年 We look toward our distant home in the Milky Way.But we sec mostly one large intervening cluster of galaxics,called the Virgo Cluster.Galaxies as a rule associate into orbiting dusters and groups.There is reason to believe that our Milky Way is itself an ouclier of the big Virgo Cluster,responsive to its steady gravicational pull:part of a supercluster.Out there beyond the Milky Way is a good-sized volume nearly devoid of noticeable galaxies. mgP.C▣m
一 亿 光 年
102moters ~10 million light-years~3 megaparsecs 一千万光年 These are the galaxies of our own cosmic region,cach single bright spot made by the summed light of stars by the billion.Their mutual gravity binds stars into galaxies,every one a complex swarm of moving stars. moP.C▣m
一 千 万 光 年