After the second landing mission, the procedure was changed on Apollo 14 to save more of the LM fuel for its powered descent, by using the CSM's fuel to perform the DOI burn, and later raising its periapsis back to a circular orbit after the LM had made its landing. At its peak, the Apollo program employed 400,000 people and required the support of over 20,000 industrial firms and universities. Kennedy's science advisor Jerome Wiesner, who had expressed his opposition to human spaceflight to Kennedy before the President took office, and had opposed the decision to land people on the Moon, hired Golovin, who had left NASA, to chair his own "Space Vehicle Panel", ostensibly to monitor, but actually to second-guess NASA's decisions on the Saturn V launch vehicle and LOR by forcing Shea, Seamans, and even Webb to defend themselves, delaying its formal announcement to the press on July 11, 1962, and forcing Webb to still hedge the decision as "tentative". Two orbits later a second burn placed Apollo 8 into a near-circular 110.4 by 112.3 km orbit for eight orbits. The Saturn V experienced pogo oscillation, a problem caused by non-steady engine combustion, which damaged fuel lines in the second and third stages. Soon after TLI, the SLA opened and the CSM separated, turned around, came back to dock with the Lunar Module, and extracted it from the S-IVB. This was followed by five launches of boilerplate CSMs (designated AS-101 through AS-105) into orbit in 1964 and 1965. The first three lunar missions (Apollo 8, After Apollo 12 placed the second of several. , Based on his industry experience on Air Force missile projects, Mueller realized some skilled managers could be found among high-ranking officers in the U.S. Air Force, so he got Webb's permission to recruit General Samuel C. Phillips, who gained a reputation for his effective management of the Minuteman program, as OMSF program controller. Debus was named the LOC's first Director. Audio recording and transcript of President John F. Kennedy, NASA administrator James Webb, Primary guidance, navigation, and control system, Charged Particle Lunar Environment Experiment, Commercial Orbital Transportation Services, https://en.wikipedia.org/w/index.php?title=Apollo_program&oldid=999070014, Short description is different from Wikidata, All Wikipedia articles written in American English, Pages using multiple image with manual scaled images, All articles with specifically marked weasel-worded phrases, Articles with specifically marked weasel-worded phrases from December 2020, Wikipedia articles incorporating text from NASA, Wikipedia articles with SNAC-ID identifiers, Wikipedia articles with WORLDCATID identifiers, Creative Commons Attribution-ShareAlike License. Fig. No spacecraft; observations of liquid hydrogen fuel behavior in orbit, to support design of S-IVB restart capability.  The contract for design and construction of the lunar module was awarded to Grumman Aircraft Engineering Corporation, and the project was overseen by Thomas J. By 1963, Apollo was using 60 percent of the United States' production of ICs. The most recent was the Lunar Atmosphere and Dust Environment Explorer (LADEE), which became a ballistic impact experiment in 2014. Although Grumman wanted a second uncrewed test, George Low decided the next LM flight would be crewed. The ascent stage lifts off, using the descent stage as a launching pad. The astronauts returned safely on July 24..  A restartable version of the S-IVB was used as the third stage of the Saturn V. The Saturn IB could send over 40,000 pounds (18,100 kg) into low Earth orbit, sufficient for a partially fueled CSM or the LM. Office of Management and Budget Deputy Director Caspar Weinberger was opposed to this, and persuaded Nixon to keep the remaining missions. All missions were commanded by Gemini or Mercury veterans. One important rock found during the Apollo Program is dubbed the Genesis Rock, retrieved by astronauts David Scott and James Irwin during the Apollo 15 mission. Parachutes were carried to slow its descent to splashdown. 24: Earth Parking Orbit. NASA's official cost breakdown, as reported to Congress in the Spring of 1973, is as follows: Accurate estimates of human spaceflight costs were difficult in the early 1960s, as the capability was new and management experience was lacking. These anomalies are of sufficient magnitude to cause a lunar orbit to change significantly over the course of several days.  Meanwhile, Grumman was also encountering problems with the Lunar Module, eliminating hopes it would be ready for crewed flight in 1967, not long after the first crewed CSM flights. , The contracted batch of 15 Saturn Vs was enough for lunar landing missions through Apollo 20. , The Saturn IB was an upgraded version of the Saturn I. The capability of the command module's heat shield to survive a trans-lunar reentry was demonstrated by using the service module engine to ram it into the atmosphere at higher than the usual Earth-orbital reentry speed. The amount grows to $28 billion ($172 billion adjusted) if the costs for related projects such as Project Gemini and the robotic Ranger, Surveyor, and Lunar Orbiter programs are included.. While the determination of responsibility for the accident was complex, the review board concluded that "deficiencies existed in command module design, workmanship and quality control". Starting with Apollo 13, descent orbit insertion was to be performed using the service module engine instead of the LM engine, in order to allow a greater fuel reserve for landing. The Apollo spacecraft could be tested in two vacuum chambers capable of simulating atmospheric pressure at altitudes up to 250,000 feet (76 km), which is nearly a vacuum. I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and returning him safely to the Earth. By 1971, the decision was made to also cancel missions 18 and 19. The list of types covered follow-on lunar exploration to include H lunar landings, I for lunar orbital survey missions, and J for extended-stay lunar landings.. Bypassing the NASA hierarchy, he sent a series of memos and reports on the issue to Associate Administrator Robert Seamans; while acknowledging that he spoke "somewhat as a voice in the wilderness", Houbolt pleaded that LOR should not be discounted in studies of the question.  The Apollo 15 subsatellite PFS-1 and the Apollo 16 subsatellite PFS-2, both small satellites released from the Apollo Service Module, contributed to this discovery. In September 1962, by which time two Project Mercury astronauts had orbited the Earth, Gilruth had moved his organization to rented space in Houston, and construction of the MSC facility was under way, Kennedy visited Rice to reiterate his challenge in a famous speech: But why, some say, the Moon?  Johnson responded approximately one week later, concluding that "we are neither making maximum effort nor achieving results necessary if this country is to reach a position of leadership. Apollo 5 (AS-204) was the first uncrewed test flight of the LM in Earth orbit, launched from pad 37 on January 22, 1968, by the Saturn IB that would have been used for Apollo 1. Mueller agreed, and Phillips managed Apollo from January 1964, until it achieved the first human landing in July 1969, after which he returned to Air Force duty.. That was the vital maneuver needed to reach the moon's surface, and Apollo 11's crew was prepared for any contingency.  It was also clear NASA would soon outgrow its practice of controlling missions from its Cape Canaveral Air Force Station launch facilities in Florida, so a new Mission Control Center would be included in the MSC.. Dress rehearsal for first lunar landing; flew LM down to 50,000 feet (15 km) from lunar surface. The Apollo 11 first manned landing mission employed the first attempt to correct for the perturbation effect (the frozen orbits were not known at that time). The second and third stages burned liquid hydrogen, and the third stage was a modified version of the S-IVB, with thrust increased to 230,000 pounds-force (1,020 kN) and capability to restart the engine for translunar injection after reaching a parking orbit. , Apollo 15 was launched on July 26, 1971, with David Scott, Alfred Worden and James Irwin. All samples returned from the Moon are highly brecciated as a result of being subjected to multiple impact events. Truly a milestone moment in space exploration. NASA never volunteered the tiger team findings to the US Congress in the course of its regular oversight, but its existence was publicly disclosed as "the Phillips report" in the course of the Senate investigation into the Apollo 204 fire. The final choice of lunar orbit rendezvous changed the CSM's role to the translunar ferry used to transport the crew, along with a new spacecraft, the Lunar Excursion Module (LEM, later shortened to LM (Lunar Module) but still pronounced /ˈlɛm/) which would take two individuals to the lunar surface and return them to the CSM. Insertion (LOI) 830 Deorbit 20 Landing 1850 Summarizing calculation of the HOTtrajectory to the Moon.  Despite Kennedy's rhetoric, he did not immediately come to a decision on the status of the Apollo program once he became president. 30 minutes  NASA's budget could not sustain Apollo missions which cost, on average, $445 million ($2.28 billion adjusted) each while simultaneously developing the Space Shuttle. , The Apollo astronauts were chosen from the Project Mercury and Gemini veterans, plus from two later astronaut groups. , Seamans' establishment of an ad hoc committee headed by his special technical assistant Nicholas E. Golovin in July 1961, to recommend a launch vehicle to be used in the Apollo program, represented a turning point in NASA's mission mode decision. The command module pilot was Gemini veteran Richard F. Gordon Jr. Conrad and Bean carried the first lunar surface color television camera, but it was damaged when accidentally pointed into the Sun. Five subsequent Apollo missions also landed astronauts on the Moon, the last, Apollo 17, in December 1972. , The G mission was achieved on Apollo 11 in July 1969 by an all-Gemini veteran crew consisting of Neil Armstrong, Michael Collins and Buzz Aldrin. It was 33 feet (10.1 m) in diameter and stood 363 feet (110.6 m) tall with its 96,800-pound (43,900 kg) lunar payload. At 1:28 p.m. EDT, it fired its service module rocket to go into lunar orbit.  NASA discontinued the crewed Block I program, using the Block I spacecraft only for uncrewed Saturn V flights. This craft provided the first pictures of the far side of the Lunar surface.. , North American Aviation won the contract to build the CSM, and also the second stage of the Saturn V launch vehicle for NASA. The design, development and construction of the center was conducted by Kurt H. Debus, a member of Dr. Wernher von Braun's original V-2 rocket engineering team. After the last lunar landing, total funding for the Apollo program was about $19,408,134,000. The LRO’s primary mission is to make a 3-D map of the lunar surface. Includes the first LOS portion of the flight. After an exhaustive three-year search, it was concluded that the tapes had probably been erased and reused. NASSP was originally developed by Jean-Luc Rocca-Serra, who released the source code to version 4.x. First crewed flight of Saturn V; First crewed flight to Moon; CSM made 10 lunar orbits in 20 hours. The intent of this mission was to achieve trans-lunar injection, followed closely by a simulated direct-return abort, using the service module engine to achieve another high-speed reentry. Pressure rose high enough from the fire that the cabin inner wall burst, allowing the fire to erupt onto the pad area and frustrating attempts to rescue the crew. , The plugs-out test began on the morning of January 27, 1967, and immediately was plagued with problems. 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