Somebody on another forum asked about this, and I recall such a fic did exist ~20 years ago, but I don't recall if it was on Artemus and Luna's A Sailor Moon Romance, Usenet, FFML, anifics, or some other website. I recall that it was short, possibly abandoned.
When the astronauts from one of the Apollo missions are exploring the moon in the moon buggy, they stumble upon the ruins with the hologram of Queen Serenity from the episode of Sailor Moon when Usagi meets a hologram of Queen Serenity of the Moon Kingdom who gives us the backstory on the Fall.