Turing Test is a robot pony. She's Equestria's Minister of Technology (it's a long story). When she learns of the untold advanced technology in the world of humans, however, she sets off on the ultimate field trip. Canterlot High has a new student...
Humanity's space exploration ultimately took the form of billions of identical probes, capable of building anything (including astronauts themselves) upon arrival at their destinations. One lands in Equestria. Things go downhill from there.
The ES Harmony, the pride of Princess Twilight Sparkle and Equestria's first FTL capable starship. It is due to make its maiden voyage to travel further than anypony before it, and yet its first mission... may be its last.
In a steampunk reimagining of the universe, Twilight Sparkle finds perhaps the one pony as lonely as she is. It's rather unfortunate that they're on the moon.