The oldest science fiction story might be 'The True History'. This ancient work is filled with all kinds of science - fiction - like elements. For example, it has a description of a journey through the cosmos. The story was written in a time when the understanding of science was very different from today. But still, Lucian managed to create a story that had these futuristic and otherworldly concepts. It shows that humans have always been fascinated by the idea of the unknown and the possibilities of what lies beyond our world, and this story was one of the first attempts to explore those ideas in a fictional context.
Well, the 'The True History' by Lucian of Samosata is often regarded as an early science fiction story. It was way ahead of its time. In this story, there are these really imaginative ideas like traveling to the moon and having all sorts of strange adventures in outer space. It's amazing how Lucian was able to come up with such concepts so long ago. His work has had a significant influence on the development of the science fiction genre over the centuries. You can see elements of his ideas being reused and expanded upon in many modern science fiction works.
One of the oldest science fiction stories is 'The True History' by Lucian of Samosata, written in the 2nd century AD. It contains elements like space travel and encounters with alien life forms, which are typical in science fiction today.