Wiktionary
n. a theoretical extraterrestrial being associated with paleocontact
Usage examples of "ancient astronaut".
Besides, all that ancient astronaut-as-Cold Warrior garbage from the 1960s, which still clung around NASA, just did not cut any ice with Benacerraf.
Close to the Kennedy Space Center, this was an ancient astronaut party house that NASA had converted into a conference centre.
NASA itself had sent a senior administrator and an ancient astronaut left over from the early days of Mars exploration.
You can moon around with your ancient astronaut all you want when we get a work camp set up.
He had on an ancient astronaut's jacket, in silver-tipped black fur, puffed pantaloons of mauve and ivory stripes, knee-boots of orange lurex hide, a broad-brimmed hat of panda ears, all sewn together in the most fanciful way.
The only other sign that anyone had ever lived there was a lone chef's jacket on a hanger in one of the closets-like an artifact, evidence of an ancient astronaut who'd been here before me.