Sundancer was the proposed third prototype space habitat intended to be launched by Bigelow Aerospace—and the first human-rated expandable module based on TransHab technology acquired from NASA.

[6] Sundancer was to spend its first six to nine months on-orbit in a checkout configuration to test systems, followed by crewed shakedown missions when transport vehicles become available.

[1] Like the Genesis pathfinders, Sundancer will launch with its outer surface compacted around its central core, with air expanding it to its full size after entering orbit.

[13] Bigelow Aerospace is also considering an option to include lights on the exterior of the spacecraft, potentially visible from Earth, which would be a furtherance of the projection system currently flying aboard Genesis II.

"[14] Due to the added size and mass of Sundancer over previous modules, the craft would have required a medium-lift launch vehicle to take it into orbit.