Source : WordNet®

deep space
     n : any region in space outside the solar system

Source : Free On-Line Dictionary of Computing

deep space
     
        1. The notional location of any program that has gone {off the
        trolley}.  Especially used of programs that just sit there
        silently grinding long after either failure or some output is
        expected.  "Uh oh.  I should have had a prompt ten seconds
        ago.  The program's in deep space somewhere." Compare {buzz},
        {catatonic}, {hyperspace}.
     
        2. The metaphorical location of a human so dazed and/or
        confused or caught up in some esoteric form of {bogosity} that
        he or she no longer responds coherently to normal
        communication.
     
        [{Jargon File}]