Skaia

Skaia is the world that the Homestuck Kids must build up toward using Sburb. It is supposedly a source of unlimited creative potential. It resides at the core of the Incipisphere, above the The Medium. Prospit is charged with its defense, while the Dark Kingdom covets its destruction. The forces of Light and Dark dueled there, in a perfect stalemate, until the arrival of John. Then, their real battle began, one that the Light is destined to lose.

It appears, coinciding with the chalk drawings the Wayward Vagabond drew on the Skyship Base wall in Act 2, that Can Town is a representation of Skaia, with the light planet and its moon representing the Light Kingdom, the four smaller planets representing the children's locations, and the dark planet representing the Dark Kingdom.

Additionally, a diagram in the Laboratory that Rose explores indicates there are in fact 8 planets leading to Skaia, each with seven gates leading to it. What this means is unknown as of yet.