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• Neutron Gravity and the Anti-universe
  ...pace flow reverses direction from inward to outward or vice-versa. Cepheid variable stars apparently expand and contract in cycles of a few days because they a
  4 KB (697 words) - 19:44, 1 January 2017
• Hubble's law
  | Uses time delays between multiple images of distant variable sources produced by [[strong gravitational lensing]]. ...redshift to other distance methods, including [[Tully-Fisher]], [[Cepheid variable]]s, and [[Type I supernova]]e
  62 KB (9,085 words) - 20:13, 4 February 2018
• Centaurus A
  ...distance to Centaurus A established from several indicators such as [[Mira variable]]s and [[planetary nebula]]e favour a more distant value of ~3.8 Mpc.<ref n
  29 KB (4,015 words) - 12:30, 5 February 2018