God...I hate that I remember all these...The satellite would have made a lot more sense with a ship. As it stands, it was just drifting around millions of miles from Earth. The lack of moon and space ship just made them feel out of place to me. Different strokes...I recall seeing the original mural design, somewhere, or I may have had seven too many beers last night. Sort of beside the point, but shows that the original top was drastically different from how it was planned.But I'll say it again I don't think it was "failed" it was just never seen through. I'll need to read one of my books over again but one of the Imagineers who was borrowed from Horizons was brought in to oversee the completion of the moon part and he called it off at the last minute (hence the awkward moon cut outs). The spacestation effect wasn't failed and was very well recieved.
If I may
Claudio Mazzoli painted the mural for SSE; Bob McCall painted the Prologue and the Promise that stood in Horizons until 1986. In the SSE mural, details can be found all the original 1982 ride. Interestingly, the original design was slightly different and featured the planned spaceship in 180top which the ride vehicles were to have exited out of.