The National Aeronautics and Space Administration (NASA ) is an independent agency of the U.S. federal government responsible for the United States' civil space program, as well as research in aeronautics and space. Headquartered in Washington, D.C., NASA operates ten field centers across the US and is organized into three mission directorates: Human Spaceflight, Research and Technology, and Science. Established in 1958 amid the Space Race, NASA succeeded the National Advisory Committee for Aeronautics (NACA) to give the US space program a distinct civilian orientation focused on peaceful applications. Since then, it has led most American spaceflight programs, including Project Mercury, Project Gemini, the Apollo program, Skylab, the Space Shuttle, the International Space Station (ISS), and the ongoing multinational Artemis program.
NASA maintains extensive ground and communications infrastructure, including the Deep Space Network and the Near Earth Network. Its science programs focus on Earth observation through the Earth Observing System, heliophysics research, Solar System exploration with robotic missions such as New Horizons and the Perseverance rover, and astrophysics investigations using space-based observatories including the James Webb Space Telescope and the Hubble Space Telescope. The Launch Services Program oversees operations for uncrewed launches.
The agency supports the ISS through international partnerships and highly successful commercial initiatives, such as the Commercial Crew Program and Commercial Resupply Services. NASA also leads the development of the Orion spacecraft and the Space Launch System rocket for the Artemis program. NASA collaborates globally with organizations including the European Space Agency (ESA), the Japan Aerospace Exploration Agency (JAXA), the Canadian Space Agency (CSA), and Russia's Roscosmos (for ISS operations), as well as domestically with US agencies such as the National Oceanic and Atmospheric Administration, the United States Geological Survey, and the United States Space Force. NASA's missions and media initiatives, including the NASA+ streaming service, contribute significantly to its public visibility and outreach. The agency has also influenced popular culture since the historic Apollo 11 Moon landing in 1969. For fiscal year 2026, NASA was authorized a budget of $24.4 billion and employs approximately 18,400 civil servants; since December 2025
History Creation
NASA traces its roots to the National Advisory Committee for Aeronautics (NACA). Although Dayton, Ohio, is considered the birthplace of aviation, by 1914 the United States recognized that it lagged significantly behind Europe in aviation capability. Determined to regain American leadership in aviation, the US Congress created the Aviation Section of the US Army Signal Corps in 1914 and established NACA in 1915 to foster aeronautical research and development. Over the next forty years, NACA conducted aeronautical research in support of the US Air Force, US Army, US Navy, and the civil aviation sector. Following the end of World War II, NACA became interested in the possibilities of guided missiles and supersonic aircraft, developing and testing the Bell X-1 in a joint program with the US Air Force. NACA's interest in space grew out of its rocketry program at the Pilotless Aircraft Research Division.
The Soviet Union's launch of Sputnik 1 ushered in the Space Age and kicked off the Space Race. Despite NACA's early rocketry program, the responsibility for launching the first American satellite initially fell to the Naval Research Laboratory's Project Vanguard. Vanguard's operational issues led the Army Ballistic Missile Agency to successfully launch Explorer 1, America's first satellite, on February 1, 1958.
The Eisenhower Administration decided to separate the nation's military and civil spaceflight programs, which had been previously organized together under the Department of Defense's Advanced Research Projects Agency. NASA was established on July 29, 1958, with the signing of the National Aeronautics and Space Act, and began operations on October 1, 1958.
As America's premier aeronautics agency, NACA formed the core of NASA's new structure, reassigning 8,000 employees and three major research laboratories to the new entity. NASA also absorbed the Naval Research Laboratory's Project Vanguard, the Army's Jet Propulsion Laboratory (JPL), and the Army Ballistic Missile Agency under the leadership of Wernher von Braun. This established NASA firmly as the US's civil space leader, while the Air Force retained military space leadership.
First orbital and hypersonic flights
Plans for human spaceflight began within the US Armed Forces prior to NASA's creation. The Air Force's Man in Space Soonest project formed in 1956, coupled with the Army's Project Adam, serving as the foundation for Project Mercury. NASA established the Space Task Group to manage the program, which conducted crewed suborbital flights with the Army's Redstone rockets and orbital flights with the Air Force's Atlas launch vehicles. While NASA originally intended for its first astronauts to be civilians, President Eisenhower directed that they be selected from the military. The Mercury 7 astronauts included three Air Force pilots, three Navy aviators, and one Marine Corps pilot.
On May 5, 1961, Alan Shepard became the first American to enter space, performing a suborbital spaceflight aboard Freedom 7. This flight occurred 23 days after the Soviet cosmonaut Yuri Gagarin became the first human in space, executing a full orbital flight. NASA's first orbital spaceflight was conducted by John Glenn on February 20, 1962, in the Friendship 7, completing three full orbits before reentering. Glenn had to fly parts of his final two orbits manually due to an autopilot malfunction. The sixth and final Mercury mission was flown by Gordon Cooper in May 1963, completing 22 orbits over 34 hours aboard Faith 7. The Mercury program was widely recognized as a resounding success, achieving its objectives to orbit a human in space, develop tracking and control systems, and identify other technical and physiological issues associated with human spaceflight.
While much of NASA's attention turned to space, it continued its aeronautics mission. Early aeronautics research attempted to build upon the 's supersonic flight to develop an aircraft capable of hypersonic flight. The North American X-15 was a joint NASA–US Air Force program, with the hypersonic test aircraft becoming the first non-dedicated spacecraft to cross from the atmosphere into outer space. The also served as a critical testbed for Apollo program technologies, as well as ramjet and scramjet propulsion.
Moon landing
Escalations in the Cold War between the US and the Soviet Union prompted President John F. Kennedy to charge NASA with landing a man on the Moon and returning him safely to Earth by the end of the 1960s. Kennedy installed James E. Webb as NASA administrator to execute this ambitious objective. On May25, 1961, Kennedy openly declared this goal in his "Urgent National Needs" speech to Congress, stating:
Kennedy further galvanized the nation during his "We choose to go to the Moon" speech on September12, 1962, at Rice University, hoping to reinforce public support for the Apollo program.
Despite criticism of the Moon landing goal from former president Dwight D. Eisenhower and 1964 presidential candidate Barry Goldwater, President Kennedy was able to protect NASA's growing budget, half of which was dedicated directly to human spaceflight. It was later estimated that, at its peak, 5% of the American workforce contributed in some capacity to the Apollo program.
Mirroring the Department of Defense's management concept of using redundant systems to build the first intercontinental ballistic missiles, NASA requested that the Air Force assign Major General Samuel C. Phillips to the space agency, where he served as the director of the Apollo program. Development of the SaturnV rocket was led by Wernher von Braun and his team at the Marshall Space Flight Center, deriving it from the Army Ballistic Missile Agency's original SaturnI. The Apollo spacecraft was designed and built by North American Aviation, while the Apollo Lunar Module was designed and built by Grumman.
To develop the spaceflight skills and equipment required for a lunar mission, NASA initiated Project Gemini. Using a modified Air Force TitanII launch vehicle, the Gemini capsule could hold two astronauts for flights lasting over two weeks. Gemini pioneered the use of fuel cells instead of batteries, and conducted the first American spacewalks and orbital rendezvous operations.
The Ranger Program started in the 1950s as a response to Soviet lunar exploration; however, most early missions ended in failure. The Lunar Orbiter program achieved greater success, mapping the surface in preparation for Apollo landings, conducting meteoroid detection, and measuring radiation levels. The Surveyor program conducted uncrewed lunar landings and takeoffs, capturing surface and regolith observations. Despite the tragic setback caused by the Apollo1 fire, which killed three astronauts, the lunar program proceeded.
Apollo8 was the first crewed spacecraft to leave low Earth orbit and the first human spaceflight to reach the Moon. The crew orbited the Moon ten times on December24 and25, 1968, before returning safely to Earth. The three Apollo8 astronauts—Frank Borman, James Lovell, and William Anders—were the first humans to see the Earth as a globe in space, the first to witness an Earthrise, and the first to manually photograph the far side of the Moon.
The first lunar landing was achieved by Apollo11. Commanded by Neil Armstrong alongside astronauts Buzz Aldrin and Michael Collins, Apollo11 was one of the most historically significant missions in NASA's history, effectively ending the Space Race as the Soviet Union subsequently scaled back its lunar ambitions. Becoming the first human to step on the surface of the Moon, Neil Armstrong uttered his now famous words:
NASA conducted a total of six lunar landings as part of the Apollo program, with Apollo17 concluding the program in 1972.
End of Apollo
Wernher von Braun had advocated for NASA to develop a space station since the agency's creation. In 1973, following the end of the Apollo lunar missions, NASA launched its first space station, Skylab, aboard the final flight of the SaturnV rocket. Skylab heavily reused Apollo and Saturn hardware, with a repurposed SaturnV third stage serving as the primary orbital module. Damage sustained during its launch required the first crew to perform critical spacewalks to render the station habitable and operational. Skylab hosted nine missions and was decommissioned in 1974. It ultimately deorbited in 1979, two years prior to the inaugural flight of the Space Shuttle, making any attempt to boost its orbit impossible.
In 1975, the Apollo–Soyuz test project represented the first international spaceflight and a major diplomatic accomplishment between the Cold War rivals, simultaneously marking the last flight of the Apollo capsule. During this mission, an American Apollo spacecraft docked in orbit with a Soviet Soyuz capsule.
Interplanetary exploration and space science
During the 1960s, NASA expanded its space science and interplanetary probe program. The Mariner program served as its flagship, launching probes to Venus, Mars, and Mercury throughout the decade. The Jet Propulsion Laboratory became the lead NASA center for robotic interplanetary exploration, facilitating significant discoveries about the inner planets. Despite these early successes, Congress became hesitant to fund further interplanetary missions, and NASA Administrator James Webb suspended all future interplanetary probes to focus the agency's resources on the Apollo program.