Suggested Searches

Special delivery to ISS
An early shuttle launch
Blurry satellite against the blackness of space

Health and Medical Technical Authority (HMTA)

The goal of the HMTA for NASA spaceflight programs and projects is to: (a) provide provision for direct management of health and performance of flight crews in operations and (b) provide protection of human health.

Meet HMTA Leadership about Health and Medical Technical Authority (HMTA)

HMTA Spaceflight Program Support

HMTA is given oversight throughout NASA Spaceflight Program lifecycles by Program Crew Health and Performance Officers (CHPOs) and their teams. This oversight includes spacecraft design and development; and spaceflight mission operations. The programs below have designated CHPOs to support during development and operations.

Gateway to Partnerships

Gateway Program (GP)

The Gateway Program is building a small, human-tended space station orbiting the Moon that will provide extensive capabilities to support NASA’s Artemis campaign.


NASA’s Orion spacecraft was built to take humans farther than they’ve ever gone before. Orion will serve as the exploration vehicle that will carry the crew to space, provide emergency abort capability, sustain the crew during the space travel, and provide safe re-entry from deep space return velocities.

Artist's illustration of a human landing system descending to the lunar surface.

Human Landing System (HLS)

The Human Landing System (HLS) is the mode of transportation that will take astronauts to the lunar surface as part of the Artemis program, including the first woman and the first person of color. The program is managed at Marshall Space Flight Center in Huntsville, Alabama.

View from NASA spacewalker Thomas Marshburn's camera

Exploration Ground System (EGS)

The Exploration Ground System is based at NASA’s Kennedy Space Center in Florida. EGS was established to develop and operate the systems and facilities necessary to process and launch rockets and spacecraft during assembly, transport and launch.

The International Space Station orbiting above Earth. Four large pairs of solar panels are seen on either side of the station.

International Space Station (ISS)

The International Space Station is a large spacecraft in orbit around Earth. It serves as a home where crews of astronauts and cosmonauts live. The space station is also a unique science laboratory.

The crew members for NASA's SpaceX Crew-1 mission are photographed seated inside SpaceX's Dragon spacecraft.

Commercial Crew Program (CCP)

NASA's Commercial Crew Program is a partnership to develop and fly human space transportation systems.

An illustration of the Starlab space station, from Nanoracks, Voyager Space, and Lockheed Martin,

Commercial Destination-Free Fliers (CDFF)

Learn about NASA partnerships with Commercial Destinations-Free Fliers (CDFF). CDFFs are independent, free-flying facilities operating in orbit.


Extravehicular Activity (EVA) and Habitat Mobility Program (EHP)

Learn about NASA's EVA and Space Suit Community.

Human Spaceflight Hazards

There are 5 Hazards of Human Spaceflight that drive risks to the human system encountered during spaceflight pertaining to pre, post, and in-flight challenges affecting the crew’s health and their ability to perform the mission.

Learn More about Human Spaceflight Hazards