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• Hubble Deep Field
  ...rrective [[optics]] were installed encouraged attempts to obtain very deep images of distant [[Galaxy|galaxies]].]] ...]] when the telescope was launched in 1990, it could still be used to take images of more distant galaxies than had previously been obtainable. Because [[Spe
  33 KB (4,612 words) - 12:32, 5 February 2018
• Sloan Digital Sky Survey
  Data collection began in 2000<ref>Gunn, J. E., Siegmund, W. A., Mannery, E. J., Owen, R. E., Hull, C. L., Leger, R. F., ... & Kent, S. M. (2006). The 2.5 ...galaxies]] and [[quasars]] in the distant universe. The publicly available images from the survey were made between 1998 and 2009.
  25 KB (3,589 words) - 12:34, 5 February 2018
• Non-standard cosmology
  ...elocities of clusters of galaxies: technical details| journal = Astrophys. J.| volume = 691|issue=2 | year = 2009| pages = 1479–1493| url = http://www ...rstellar reddening]]. However, all these processes would also tend to blur images of distant objects, and no such blurring has been detected.<ref>{{cite web|
  41 KB (6,072 words) - 19:16, 4 February 2018
• Atlas of Peculiar Galaxies
  |author=A. Sandage, J. Bedke ...ly interacting systems. Tidal tails and bridges are visible in many of the images.
  76 KB (10,108 words) - 13:04, 4 February 2018
• Hubble's law
  | Uses time delays between multiple images of distant variable sources produced by [[strong gravitational lensing]]. ...ppenko|first6=Alexei V.|last7=Tucker|first7=Brad E.|last8=Reid|first8=Mark J.|last9=Jones|first9=David O.|date=2016-04-05|title=A 2.4% Determination of
  62 KB (9,085 words) - 20:13, 4 February 2018
• Thomas Edison
  ...ruck by a runaway train. Jimmie's father, [[Station master|station agent]] J. U. MacKenzie of [[Mount Clemens, Michigan]], was so grateful that he train ...|publisher=Filiquarian Publishing, LLC.}}</ref> {{anchor|sprague}}[[Frank J. Sprague]], a competent mathematician and former [[United States Navy|naval
  105 KB (15,290 words) - 17:19, 16 December 2018