Human exploration of a near-Earth asteroid. Image credit: John Frassanito & Associates
The Exploration Technology Development Program (ETDP) develops long-range technologies to enable human exploration beyond Earth orbit.
ETDP also integrates and tests advanced exploration systems to reduce risks and improve the affordability of future missions.
Projects
The projects in the Exploration Technology Development Program were formulated to address the high priority technology needs for human spaceflight. All technology projects are managed at NASA Centers.
![]() | Advanced In-Space Propulsion: This project develops concepts, technologies, and test methods for high-power electric propulsion and nuclear thermal propulsion systems to enable low-cost and rapid transport of cargo and crew beyond low Earth orbit. |
| Autonomous Systems and Avionics: This project develops and demonstrates integrated autonomous systems capable of managing complex operations in space to reduce crew workload and dependence on support from Earth. Technologies will address operations in extreme environments, efficient ground-based and on-board avionics systems and operations, and cost-effective human-rated software development. |
| Cryogenic Propellant Storage and Transfer: This project develops technologies to enable long-duration storage and in-space transfer of cryogenic propellants. Technology development includes active cooling of propellant tanks, advanced thermal insulation, measurement of propellant mass, liquid acquisition devices, and automated fluid couplings for propellant transfer between vehicles. |
| Entry, Descent, and Landing (EDL) Technology: This project develops advanced thermal protection system materials, aerothermodynamics modeling and analysis tools, and concepts for aerocapture and atmospheric entry systems for landing large payloads safely and precisely on extra-terrestrial surfaces and returning to Earth. |
| Extravehicular Activity Technology: This project develops component technologies for advanced space suits to enable humans to conduct "hands-on" surface exploration and in-space operations outside habitats and vehicles. Technology development includes portable life support systems, thermal control, power systems, communications, avionics, and information systems, and space suit materials. |
| High-Efficiency Space Power Systems: This project develops technologies to provide low-cost, abundant power for deep-space missions, including advanced batteries and regenerative fuel cells for energy storage, power management and distribution, solar power generation, and nuclear power systems. A major focus will be on the demonstration of dual-use technologies for clean and renewable energy for terrestrial applications. |
| Human Robotic Systems: This project develops advanced robotics technology to amplify human productivity and reduce mission risk by improving the effectiveness of human-robot teams. Key technologies include teleoperation, human-robot interaction, robotic assistance, and surface mobility systems for low-gravity environments. Early demonstrations will focus on human teams interacting with multiple robotic systems. Longer-term demonstrations will focus on enabling operations in remote, hostile environments with limited support from Earth. |
| In-Situ Resource Utilization: This project will enable sustainable human exploration by using local resources. Research activities are aimed at using lunar, asteroid, and Martian materials to produce oxygen and extract water from ice reservoirs. A flight experiment to demonstrate lunar resource prospecting, characterization, and extraction will be considered for testing on a future robotic precursor exploration mission. Concepts to produce fuel, oxygen, and water from the Martian atmosphere and from subsurface ice will also be explored. |
| Life Support and Habitation Systems: This project develops technologies for highly reliable, closed-loop life support systems, radiation protection technology, environmental monitoring and control technologies, and technologies for fire safety to enable humans to live for long periods in deep-space environments. |
| Lightweight Spacecraft Materials and Structures: This project develops advanced materials and structures technology to enable lightweight systems to reduce mission cost. Technology development activities focus on structural concepts and manufacturing processes for large composite structures and cryogenic propellant tanks for heavy lift launch vehicles, and on fabric materials and structural concepts for inflatable habitats. |
Advanced Exploration Systems Projects
Advanced exploration systems incorporate new technologies to enable future capabilities for deep space exploration. Prototype systems are demonstrated in ground tests and flight experiments.
| Multi-Mission Space Exploration Vehicle: This project is developing a prototype crew excursion vehicle to enable exploration of Near Earth Asteroids and planetary surfaces. |
| Deep Space Habitat: This project is developing concepts and prototype subsystems for a habitat that will allow the crew to live and work safely in deep space. |
| Autonomous Precision Landing Systems: This project is developing optical sensors, and navigation and control algorithms to enable the capability for autonomous precision landing on the Moon or Mars. The autonomous precision landing system will be demonstrated in flight tests of a small lander. |
| Analogs: This project is demonstrating prototype systems and operational concepts for exploration of Near Earth Asteroids and Mars in simulations, desert field tests, underwater environments, and ISS flight experiments. |

