Deep Space Habitat (DSH) is a 2012 proposed NASA conceptual design to support a crew of 4 for exploration beyond Low Earth orbit. Initial concept missions include 60-day and 500-day mission configurations, composed of International Space Station-derived hardware, the Orion crew capsule and various support craft. The Habitat would be equipped with at least one International Docking System Standard (IDSS) docking system. Developing a Deep Space Habitat would allow a crew to live and work safely in space for up to one year on missions to explore cis-lunar space and some near-Earth asteroids. It would also provide experience favorable for designing longer-duration habitats that could be used for manned missions to Mars and more distant asteroids.
In 2015 NASA funded the studies of several types of deep space habitat concepts under the Next Space Technologies for Exploration Partnerships (NextSTEP). Further details were provided in 2017. As of March 2017[update] Phase 1 DSH development is complete, Phase 2 is being worked on and Phase 3 is being planned.
Propulsion options studied included: