It's not structurally finished, but I have the main layout or whatever and the events pretty much done.

Frontrox built the solar panels and battery thing in the outside.

Battery up close.

The front of the building, showing an underground view.

To the side, a switch.

Interior; the other side's basically mirrored, except without that door with the button.
Now for some general information now that you've seen it.
I plan on removing the yellow wires.
They just get in the way, and they're ugly.
If I can find some other way to transport the imaginary power, or if someone would suggest a way, that would be great.
The doors leading outside act like an airlock; only one can open at a time.
The door with the red button is unlocked/locked with a white keycard using the keycard addon I found in RTB.
Right now, it just leads to a small empty space, within which I'll add more useful stuff later.
The valves and switches act like a life support type thing.
Turning off the valve gives you fifteen seconds before you start to "suffocate." The switch gives you a minute.
I could explain more about these, but I wont unless someone asks.
The solar panels serve no actual purpose, besides aesthetic ones.
Later I'll make a city on the large planet as a separate save, and a station on the base outside the planet as another one.
Also if you're wondering why the ground's unusually pink, it's because I have the addon that changes the admin orb to hearts, and the other one that adds a light to it.
If you have any other questions, just ask.