Questions of Light and Space

If space is expanding, and everything is moving away from everything else at an ever increasing speed as described here(Subheading observational evidence), how can Nebula collide?

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Questions of Light and Space Balance_Maintained 2010-10-09, 08:37 AM
- Questions of Light and Space David Turell 2010-10-09, 01:45 PM
  - Questions of Light and Space Balance_Maintained 2010-10-09, 02:35 PM
    - Questions of Light and Space David Turell 2010-10-09, 03:34 PM
      - Questions of Light and Space Balance_Maintained 2010-10-09, 03:46 PM
- Questions of Light and Space George Jelliss 2010-10-09, 04:34 PM
  - Questions of Light and Space Balance_Maintained 2010-10-09, 06:21 PM
    - Questions of Light and Space David Turell 2010-10-09, 06:38 PM
      - Questions of Light and Space Balance_Maintained 2010-10-10, 03:48 AM
        
        Questions of Light and Space David Turell 2010-10-10, 04:09 AM
        
        Questions of Light and Space Balance_Maintained 2010-10-10, 04:30 AM
        
        Questions of Light and Space David Turell 2010-10-10, 02:00 PM
        
        Questions of Light and Space Balance_Maintained 2010-10-10, 02:47 PM
        
        Questions of Light and Space George Jelliss 2010-10-11, 08:01 PM
        
        Questions of Light and Space Balance_Maintained 2010-10-12, 04:22 AM
        
        Questions of Light and Space xeno6696 2010-10-19, 11:05 AM
        
        Questions of Light and Space xeno6696 2010-10-19, 10:52 AM
        
        Questions of Light and Space xeno6696 2010-10-19, 10:49 AM
- Questions of Light and Space Balance_Maintained 2010-10-12, 06:02 AM
  - Questions of Light and Space George Jelliss 2010-10-12, 10:54 AM
    - Questions of Light and Space Balance_Maintained 2010-10-12, 12:26 PM
      - Questions of Light and Space xeno6696 2010-10-19, 11:11 AM
  - Questions of Light and Space David Turell 2010-10-12, 03:52 PM
    - Questions of Light and Space Balance_Maintained 2010-10-12, 07:18 PM
      - Questions of Light and Space David Turell 2010-10-12, 09:16 PM
        
        Questions of Light and Space Balance_Maintained 2010-10-13, 04:41 AM
        
        Questions of Light and Space David Turell 2010-10-13, 05:14 AM
  - Questions of Light and Space David Turell 2011-09-23, 04:59 AM
    - Questions of Light and Space David Turell 2011-09-23, 02:14 PM
      - Questions of Light and Space dhw 2011-09-24, 04:19 PM
        
        Questions of Light and Space David Turell 2011-09-26, 10:05 PM
        
        Questions of Light and Space David Turell 2011-10-03, 04:19 AM
- Questions of Light and Space xeno6696 2010-10-19, 01:51 AM

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Questions of Light and Space (Introduction)