At 08:57 AM 1/30/98 +1300, you wrote: >> I suggest using two PCs... the one you have... . . The same thing with a CCD needs 500k. Add to that the power >consumption of the Peltier device and both objectives go out the window. >But you do get pretty pictures. :-) > >Steve. A Stirling engine that is CCD sized has been developed as economically better than l N2...(that's cheap in dollars and in Watts!) You should look that up before giving up on a solar/battery powered telescope John Griessen Austin TX