Johnson Space Center

• 1. Introduction

  ›

  Johnson Space Center sits on 1,620 acres of land in Clear Lake, Texas, and from it NASA has controlled every American crewed space mission since Gemini 4. That record stretches across Apollo moon landings, Skylab, the Space Shuttle, and on through the current Artemis program. But the campus itself began as cattle pasture, donated to Rice University by an oil company, 25 miles southeast of Houston. How did a patch of coastal Texas grazing land become the nerve center of human spaceflight? The answers run through politics, a canceled Canadian fighter jet, and a very specific list of requirements drawn up in 1961 that no one expected would end in Houston.

• 2. Origins in Virginia

  ›

  On the 5th of November 1958, a group of Langley Research Center engineers in Hampton, Virginia, took on direction of Project Mercury under Robert R. Gilruth. The team was called the Space Task Group, and it started with a total staff of 45 people: 37 engineers and eight secretaries and human "computers," the term used then for women who ran calculations on mechanical adding machines. In 1959, the STG absorbed 32 engineers from Canada, all of them put out of work by the cancellation of the Avro Canada CF-105 Arrow fighter project. NASA's first administrator, T. Keith Glennan, could already see the organization would outgrow both Langley and the Goddard Space Flight Center in Maryland. On the 1st of January 1961, he wrote a memo to his yet-unnamed successor recommending the search for a new site begin immediately. That successor turned out to be James E. Webb, and it was Webb who would carry the search forward once President Kennedy set the goal of a Moon landing by the end of the decade.

• 3. The Houston Decision

  ›

  In August 1961, Webb asked John F. Parsons of the Ames Research Center to lead a site-selection team. The team began with 22 cities that met basic climate and water-transport criteria, then cut the list to nine candidates with nearby federal facilities, including sites in Florida, Louisiana, California, and Texas. From August 21 through September 7, the team physically visited all 23 sites on the expanded list. MacDill Air Force Base in Tampa ranked first, because the Air Force was planning to vacate it. The Houston site adjacent to Rice University ranked second. When the Air Force reversed course and decided to keep MacDill open, Houston moved to the top. Webb informed President Kennedy of the decision on the 14th of September 1961, noting in a memo that the new laboratory should be located "in Houston, Texas, in close association with Rice University." The public announcement followed on September 19. Texas A&M historian Henry C. Dethloff later observed that Texas had "undoubtedly exerted an enormous political influence" on the decision: Lyndon B. Johnson was Vice President and chaired the Space Council; Albert Thomas headed the House Appropriations Committee; and Sam Rayburn was Speaker of the House of Representatives.

• 4. Building the Center

  ›

  The land chosen for the new facility was 1,000 acres that Humble Oil had donated to Rice University, at the time used to graze cattle. NASA purchased an additional 600 acres so the property would front a highway, plus a 20-acre reserve drilling site. Charles Luckman designed the complex, and construction began in April 1962. While the buildings rose, Gilruth's staff operated out of 295,996 square feet of leased office and laboratory space spread across 11 scattered temporary sites. In September 1962, President Kennedy delivered his famous speech at Rice University in which he described what was coming: the National Aeronautics and Space Administration expected to invest some $200 million in plant and laboratory facilities and to direct or contract for more than $1 billion in new space efforts from Houston. The finished campus opened for business in September 1963, with 100 buildings on the 1,620-acre site. Houston had already been given the official nickname "Space City" by 1967.

• 5. Mission Control Takes Shape

  ›

  As Project Gemini was being planned in 1961, flight controllers realized the Mercury Control Center at Cape Canaveral Air Force Station was not going to be adequate for missions involving maneuverable spacecraft. Christopher Kraft and three other controllers directed a study contract to Philco's Western Development Laboratory to figure out what a better facility would require. Philco then won the contract to build the electronic equipment for the new Mission Control Center, which would occupy Building 30 at JSC rather than sitting at the launch site. Construction began in 1963. The new center had two Mission Operations Control Rooms, so one mission could be in progress while training for the next was already underway. Testing began during the uncrewed Gemini 2 flight in January 1965 and continued through the first crewed Gemini flight, Gemini 3, in March 1965, but Mercury Control still held primary authority for those flights. Full operational control transferred with Gemini 4 the following June, and the center has held that responsibility ever since. On the 14th of April 2011, NASA formally named it the Christopher C. Kraft Jr. Mission Control Center.

• 6. Apollo and the Moon Rocks

  ›

  Johnson Space Center played a role in the Apollo program that went beyond flight control. The campus housed the Lunar Receiving Laboratory, where the first astronauts back from the Moon were quarantined, and the facility still stores the majority of lunar samples returned during Apollo. Building 31-N holds the Lunar Sample Laboratory Facility, which stores, analyzes, and processes those samples. The center's Landing and Recovery Division operated a vessel called MV Retriever in the Gulf of Mexico, where Gemini and Apollo astronauts practiced water egress after splashdown. On the 19th of February 1973, President Richard Nixon signed a Senate resolution renaming the Manned Spacecraft Center in honor of Lyndon B. Johnson, who had died four weeks earlier and who, as Senate Majority Leader, had sponsored the 1958 legislation that created NASA. Dedication ceremonies were held six months later, on August 27. One artifact on display at the center is a Saturn V rocket assembled from actual surplus flight-ready articles, with real though incomplete Apollo command and service modules originally intended for the canceled Apollo 19 mission. In June 2019, the restored Apollo Mission Control Center opened to tourists.

• 7. Training, Research, and the Pool

  ›

  About 3,200 civil servants work at Johnson Space Center, including 110 astronauts, alongside a workforce of more than 11,000 contractors. Astronaut candidates who train there cover spacecraft systems alongside mathematics, guidance and navigation, oceanography, orbital dynamics, astronomy, and physics. Military water survival is a prerequisite before flight instruction begins. Candidates must also become scuba-certified for extravehicular training and pass a swimming test. The Neutral Buoyancy Laboratory provides the main environment for spacewalk preparation: a pool containing approximately 6.2 million US gallons of water, where astronauts rehearse tasks in conditions that simulate weightlessness. Once certified, they maintain flying proficiency by logging 15 hours per month in NASA's T-38 jets based at nearby Ellington Field. On the research side, JSC received a five-year, $120-million extension of its agreement with the National Space Biomedical Research Institute at Baylor College of Medicine to study health risks tied to long-duration spaceflight. The Texas Space Commission was established at the center by Texas governor Greg Abbott on the 26th of March 2024.

• 8. Loss and Remembrance

  ›

  On the 31st of January 1986, three days after the Space Shuttle Challenger broke apart during launch, President Ronald Reagan and First Lady Nancy Reagan came to Johnson Space Center to speak at a memorial service. Six thousand NASA employees and 4,000 guests attended, along with the families of the crew. An Air Force band led the singing of "God Bless America" as NASA T-38 Talon jets flew directly overhead in the missing-man formation. The service was broadcast live on national television and radio. A comparable memorial was held at the center on the 4th of February 2003, for the crew of Space Shuttle Columbia, with President George W. Bush and First Lady Laura Bush in attendance. That service was also broadcast nationally, though it was oriented primarily toward NASA employees and the astronauts' families. A second national service two days later was led by Vice President Dick Cheney at Washington National Cathedral. On the 13th of September 2008, Hurricane Ike struck Galveston as a category 2 storm, causing minor damage to the Mission Control Center and other buildings and damaging the roofs of several T-38 hangars at Ellington Field. The center's director Vanessa Wyche returned to the directorship on the 3rd of September 2025, becoming the twelfth director to lead the center.