The Door
The unnamed moon wasn’t really discovered, it was given a number and catalogued. The moon orbited a gas giant with a similar number in the same catalogue. The unnamed and numbered star the planet orbited was of course plotted long ago. The orbits of the planet and the moon were first plotted by an unmanned probe. The probe concluded - incorrectly - that there was nothing of note in the system. The system was left lonely for several centuries after the probe left. It wasn’t until a lone starship with engine troubles stopped in the system for maintenance. The ship’s troubles were common and uninteresting. The ship itself was an ordinary transport ship. While the engineering crew fixed the ship a few of the crew landed on the moon for some “fresh air” in their space suits. The three of them explored the moon and found a cave to explore. The cave itself was as uninteresting as the moon, the planet, and the star. It was what they found deep within the cave that was truly discovere...