I've seen quite a few big Moonrise prints - after all, it was not only his most famous image, but by far, his most printed cash cow, over 350 of them.
No need for Photoshop. Michael Fatali simply sandwiched 8x10 chromes together for sake of optical Ciba enlargements, in one instance three of them, with both the rising moon and setting sun in astronomical impossible proximity. One should get suspicious of exactly the same crescent moon appearing in the same place in the sky in several different images. But the result was far more seamlessly precise, even in a 40X60 print, than anything digitally altered and printed.