Short answers, pulled from the story.
Johnson Space Center is located in Clear Lake, Texas, about 25 miles southeast of Houston. It occupies a 1,620-acre campus adjacent to Clear Lake near Galveston Bay, on land originally donated to Rice University by the Humble Oil company.
The center was renamed in honor of Lyndon B. Johnson because, as Senate Majority Leader, he sponsored the 1958 legislation that created NASA. President Richard Nixon signed the renaming resolution on the 19th of February 1973, four weeks after Johnson's death.
The Johnson Space Center, then called the Manned Spacecraft Center, officially opened for business in September 1963. Construction began in April 1962 on land that had previously been used for grazing cattle.
The Christopher C. Kraft Jr. Mission Control Center at JSC has provided flight control for every NASA human spaceflight since Gemini 4 in June 1965, including Apollo, Skylab, Apollo-Soyuz, the Space Shuttle, and Artemis. It is also responsible for directing American activities aboard the International Space Station.
The Neutral Buoyancy Laboratory at Johnson Space Center contains approximately 6.2 million US gallons of water. Astronauts use the pool to practice spacewalk tasks under conditions that simulate weightlessness.
Houston was selected in September 1961 after the original top choice, MacDill Air Force Base in Tampa, became unavailable when the Air Force decided not to close it. The Houston site's proximity to Rice University, water transport, and the political influence of Texas congressional leaders including Vice President Lyndon B. Johnson all contributed to the final decision.