John Berkey's cover art for the 1972 reprint of the short story anthology Star Science Fiction Stories No. 4
A rocket-plane diving down through space towards a gigantic mechanical planet...
Does this not look all too familiar to you?
In 1975, young George Lucas purchased several pieces of Berkey's sci-fi artwork, which served him as visual reference material while he was trying to pitch his ideas to film studios for a new space fantasy film...