Does anyone know where the three environments that you see in the startup menu screens are from? Can they be found in the actual game, or are they one-offs created for the menu?

I would really consider this "spoiler" material, so I hope this is the best place to post this.

The blue cloud with the unusually-shaped rocks looks like somewhere in a Sigma or Omega system (are those Orbital Spa and Cruise liners?). The blue rotating planet with the space station could be anywhere, though the space station in the distance is rotating which is something I've never seen in game. Finally, the system with the ringed sun and lava planet is also something I've never seen before, but would be instantly recognisable.