Science. 1989 Nov 17;246(4932):897-903. doi: 10.1126/science.246.4932.897.
Maps of the galaxy distribution in the nearby universe reveal large coherent structures. The extent of the largest features is limited only by the size of the survey. Voids with a density typically 20 percent of the mean and with diameters of 5000 km s(-1) are present in every survey large enough to contain them. Many galaxies lie in thin sheet-like structures. The largest sheet detected so far is the "Great Wall" with a minimum extent of 60 h(-1) Mpc x 170 h(-1) Mpc, where h is the Hubble constant in units of 100 km s(-1) Mpc(-1). The frequent occurrence of these structures is one of several serious challenges to our current understanding of the origin and evolution of the large-scale distribution of matter in the universe.
星系在近宇宙中的分布地图揭示了大尺度的相干结构。最大结构的范围仅受调查规模的限制。在每个足够大的调查中，都存在密度通常为平均值的 20%、直径为 5000 公里/秒的空洞。许多星系位于薄片状结构中。迄今为止检测到的最大薄片是“长城”，其最小范围为 60 h(-1) Mpc x 170 h(-1) Mpc，其中 h 是以 100 公里/秒/兆秒的单位表示的哈勃常数。这些结构的频繁出现是对我们目前对宇宙中大质量物质分布的起源和演化的理解的几个严重挑战之一。
