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• Non-standard cosmology
  ...tremely successful model, but retains some weaknesses (such as the [[dwarf galaxy problem]]). Research on extensions or modifications to Lambda-CDM, as well ...cture of the cosmos|larger scale]] than the previously assumed [[Milky Way galaxy|galactic size]]. Theorists who successfully developed cosmologies applicabl
  41 KB (6,072 words) - 19:16, 4 February 2018
• Gravitational redshift
  ...g.org/news/2011/09/galaxy-clusters-validate-einsteins-theory |title=Galaxy Clusters Validate Einstein's Theory |publisher=News.sciencemag.org |accessdate=2013-
  22 KB (3,270 words) - 20:15, 4 February 2018
• Hubble's law
  # This [[Doppler shift]]-measured velocity, of various [[galaxy|galaxies]] receding from the Earth, is approximately [[Proportionality (mat ...in ([[kilometre|km]]/[[second|s]])/Mpc, thus giving the speed in km/s of a galaxy {{convert|1|Mpc|km|sigfig=3}} away. The reciprocal of ''H''₀ is
  62 KB (9,085 words) - 20:13, 4 February 2018

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