A True Story (150 AD)
sacred-texts.com
sacred-texts.com
"A True Story" - Lucian
It is the earliest known work of fiction to include travel to outer space, alien lifeforms, and interplanetary warfare. It has been described as "the first known text that could be called science fiction"
Well no, it's the earliest SURVIVING work. It's certainly interesting and a fascinating insight to how people have always looked to the stars.
Also, it was the one that got lucky and remains. I guess have to give it credit for that.
As an aside, if one does not enjoy the Fowlers' translation there is different translation done by A. M. Harmon (side-by-side with original Greek): https://www.sacred-texts.com/cla/luc/true/tru00.htm
Pliny the Elder, “The Natural History”, Book I (79)