From: henry@spsystems.net   
      
   In article <792abaf9.0404260943.23de8966@posting.google.com>,   
   Parallax  wrote:   
   >Could Hubble, along with the NexGen space telescope operate as a long   
   >baseline optical interferometer in some way?   
      
   Very unlikely to be practical.  Doing optical (imaging) interferometry   
   over baselines of tens of meters is still a serious technical challenge.   
   Doing it over 1.5Mkm is just out of the question for the foreseeable   
   future.   
      
   Also note that if you want to do imaging, you need a variety of baselines,   
   not just one.  For Earth-based systems, the variety tends to be supplied   
   for free by Earth's rotation.   
      
   >Any potential advantages in using adaptive optic methods whereby a   
   >star in the far far background of both fields of view  that should be   
   >a point source is used as a reference?   
      
   None whatsoever.  Adaptive optics are very important for working through   
   Earth's constantly-shifting atmosphere, but offer no significant advantage   
   outside it.   
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   MOST launched 30 June; science observations running     |   Henry Spencer   
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