Stereo astrophotography

I have read passing references to the use of stereo techniques in astrophotography: it sounds like the Palomar POSS (Sky Survey) was done in stereo.

Can anyone comment or point me in the direction of "How to..." information?

Bob

Considering the distance involved the only "stereo" effect that you could achieve is using the orbital circumference of the earth. In other words, shooting one photograph in the spring an another 6 months later in the fall. Even then the "stereo" would only work on the closest stars and not much of that.

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