how did they do zero gravity in apollo 13
Apollo 13 (film) Howard anticipated difficulty in portraying weightlessness in a realistic manner. He discussed this with Steven Spielberg, who suggested using a KC-135 airplane, which can be flown in such a way as to create about 23 seconds of weightlessness, a method NASA has always used to train its astronauts for space flight. Howard obtained NASA's permission and assistance in filming in the realistic conditions aboard multiple KC-135 flights.[15]
Apollo program Apollo ran from 1961 to 1972, with the first manned flight in 1968. It achieved its goal of manned lunar landing, despite the major setback of a 1967 Apollo 1 cabin fire that killed the entire crew during a prelaunch test. After the first landing, sufficient flight hardware remained for nine follow-on landings with a plan for extended lunar geological and astrophysical exploration. Budget cuts forced the cancellation of three of these. Five of the remaining six missions achieved successful landings, but the Apollo 13 landing was prevented by an oxygen tank explosion in transit to the Moon, which destroyed the Service Module's capability to provide electrical power, crippling the CSM's propulsion and life support systems. The crew returned to Earth safely by using the Lunar Module as a "lifeboat" for these functions. Apollo used Saturn family rockets as launch vehicles, which were also used for an Apollo Applications Program, which consisted of Skylab, a space station that supported three manned missions in 1973–74, and the Apollo–Soyuz Test Project, a joint US-Soviet Union Earth-orbit mission in 1975.