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Lunar Module Eagle

The Lunar Module Eagle was the spacecraft that served as the crewed lunar lander for NASA's mission, achieving the first human landing on the on July 20, 1969, in the Sea of Tranquility. Piloted by and Lunar Module Pilot Edwin "Buzz" Aldrin Jr., Eagle separated from the Command and Service Module Columbia—piloted by —and executed a powered descent to the surface after a 756-second burn, touching down approximately four miles from the planned site at coordinates 0° 41' 15" N, 23° 26' E. This historic event enabled Armstrong's famous first steps on the lunar surface, fulfilling President John F. Kennedy's goal of landing humans on the before the end of the 1960s. Manufactured by Grumman Aircraft Engineering Corporation in , Eagle (designated LM-5) was a two-stage vehicle comprising a descent stage for landing and surface operations and an ascent stage for returning the crew to . The module stood 7.0 meters (23 feet) tall with a width of 4.2 meters (14 feet) for the main body, expanding to 9.4 meters (31 feet) with deployed landing legs, and had a dry mass of approximately 4,213 kg (9,287 lb) unfueled, increasing to about 15,100 kg (33,300 lb) fully loaded with propellants, crew, and equipment. It featured a pressurized with 4.53 cubic meters of habitable volume, a 100% oxygen atmosphere, and for two astronauts for up to 33 hours, though the crew spent 21 hours and 36 minutes on the surface. Powered by hypergolic propellants in the descent propulsion system (using and nitrogen tetroxide) and a similar ascent , Eagle also included reaction control thrusters for maneuvering and four triangular landing legs with probes to signal touchdown. During the mission, Armstrong and Aldrin conducted a 2.5-hour extravehicular activity (EVA), deploying the Early Apollo Scientific Experiments Package (EASEP)—including a passive seismic experiment and laser ranging retroreflector—and collecting 21.5 kg (47.5 lb) of lunar soil and rock samples. Eagle's ascent stage lifted off from the Moon at 124 hours and 22 minutes mission elapsed time, rendezvousing and docking with Columbia after two orbits; it was subsequently jettisoned into lunar orbit, while the descent stage remained at Tranquility Base as a launch platform. As the culmination of the Apollo program's lunar landing efforts, Eagle symbolized a pivotal engineering achievement, with its successful operation validating the lunar orbit rendezvous technique and enabling subsequent Apollo missions.

Design and Development

Overview and Naming

The Lunar Module Eagle was designated LM-5, the fifth vehicle in the series constructed by Grumman Aerospace Corporation under contract to NASA. The name "Eagle" was selected by Apollo 11 crew members Neil Armstrong and Buzz Aldrin in February 1969, inspired by the bald eagle featured on the mission patch as a symbol of the United States, drawing from the presidential seal and national emblem. The callsign "Eagle" was employed throughout the mission for communications. As the lander for , Eagle achieved the historic distinction of being the first crewed spacecraft to land on the on July 20, 1969. This accomplishment fulfilled the national objective set by President in his May 25, 1961, address to , calling for a crewed lunar landing before the end of the 1960s. Eagle employed a two-stage configuration, with the descent stage facilitating powered landing on the lunar surface and the ascent stage enabling liftoff to with the command in orbit. Both stages utilized hypergolic propellants—Aerozine 50 as fuel and nitrogen tetroxide as oxidizer—for reliable ignition without an external source.

Technical Specifications

The Lunar Module Eagle (LM-5), designed for the mission, had a launch of 15,118 , which included the crew, equipment, and propellants. Its dry was approximately 4,274 , comprising a descent stage dry of about 2,034 and an ascent stage dry of roughly 2,191 . These masses reflected the vehicle's lightweight aluminum alloy construction, optimized for lunar operations while supporting two astronauts and their gear. In terms of dimensions, stood 7.04 m tall from the base of the descent stage to the top of the ascent stage, with a maximum diameter of 4.22 m for the cylindrical sections. The descent stage featured four articulated landing legs that deployed to a width of 9.4 m across the footpads, providing stability on the uneven lunar terrain. Propulsion systems included a throttleable (DPS) capable of up to 10,000 lbf (44.5 kN) of thrust, using fuel and nitrogen tetroxide oxidizer stored in tanks holding approximately 8,210 kg of propellant. The ascent propulsion system (APS) employed a fixed-thrust delivering 3,500 lbf (15.6 kN), also hypergolic, to lift the upper stage from the surface. Power was supplied by six silver-zinc batteries—four 400 Ah in the stage and two 296 Ah in the ascent —providing 28 V at a total nominal capacity of 2,192 Ah to support all electrical systems. The (ECS) sustained two astronauts for up to 48 hours, incorporating oxygen supplies, canisters for CO₂ removal, water-glycol cooling loops, and waste management provisions within a pressurized volume of 235 cubic feet. Specific to Eagle, modifications from prior tests included increased on the struts (from 29.4 lb in and 10 to 68.4 lb) to better withstand descent engine plume heating, along with lengthened lunar surface sensing probes to 5.6 feet on three legs for improved detection. The featured 36,864 words of () in core rope format, enabling autonomous navigation, guidance, and control during descent and ascent.

Manufacturing and Preparation

Construction Process

The Lunar Module Eagle (LM-5) was assembled by the Aircraft Engineering Corporation at its primary facility in , under the terms of a contract awarded on November 7, 1962, for the design, development, and production of 15 lunar modules. This contract initiated the overall program, but fabrication of the flight hardware for Eagle, the first operational vehicle intended for crewed lunar landing, began in 1967 following the completion of earlier test articles (LM-1 through LM-4). Approximately 8,000 employees contributed to the effort across engineering, manufacturing, and roles, ensuring rigorous adherence to specifications derived from the modular two-stage design heritage. Assembly proceeded in phases, commencing with the descent stage in 1968, which formed the base structure housing the , propellant tanks, and propulsion systems. Key components, including the primary pressure vessels for and oxidizer storage, were fabricated in-house at , while critical subsystems like the descent propulsion engine were supplied by subcontractor General Corporation under a dedicated development agreement. The descent stage's octagonal aluminum alloy framework was constructed using aircraft-style riveting and techniques to achieve the lightweight yet durable structure required for lunar operations. Once completed, the ascent stage—containing the crew cabin, ascent engine from Bell Aerosystems, and systems—was integrated atop the descent stage, with interconnecting umbilicals and structural mating performed in a controlled environment to prevent contamination. Structural assembly of was finalized by late 1968, culminating in tests at the facility on December 13, 1968, which verified the mated stages' mechanical integrity and subsystem interfaces. The entire production process for each , including , fell within an average cost of approximately $38 million per unit under the fixed-price incentive contract structure, reflecting the economies achieved after initial development investments. This milestone positioned as the pioneering flight-qualified , ready for shipment to NASA's —the ascent stage departed on January 7, 1969, arriving on January 8, followed by the descent stage on January 12, 1969—for final spacecraft stacking and preparations.

Testing and Modifications

Following the completion of construction in late 1968, the Lunar Module Eagle (LM-5) underwent rigorous ground testing at Aircraft Engineering Corporation's facilities in , and NASA's in . At , a series of 16 drop tests were conducted in 1968 using a structural test to validate the landing gear's integrity under simulated lunar impact conditions, with accelerations up to 12 g's confirming the crushable aluminum honeycomb struts' performance. Vibration and acoustic tests were performed to simulate launch environments, exposing the module to progressive-wave acoustic excitation levels exceeding 140 dB to ensure structural resilience. At White Sands, (RCS) tests verified thruster performance and plume deflectors, incorporating modifications like added liners to the feed ducts based on prior Apollo hardware evaluations. Thermal-vacuum tests, drawing from Lunar Module Test Article (LTA-8) certifications at the Manned Spacecraft Center in 1968, confirmed Eagle's ability to maintain cabin pressure and subsystem functionality in conditions down to 10^-5 torr. Eagle benefited from flight heritage gained during Apollo 9 (March 1969), which tested LM-3 in Earth orbit, and (May 1969), a lunar orbit rehearsal with LM-4 that identified challenges. These missions revealed issues with the probe-and-drogue mechanism, such as hard contacts during alignment, prompting and to refine the capture latches and extend the probe's retraction sequence for smoother engagements in subsequent vehicles, including Eagle. Altitude chamber tests at in early 1969 verified cabin integrity under vacuum, simulating depressurization to below 0.1 psi while testing valve assemblies and extravehicular mobility units, ensuring no leaks or microbial contamination risks. These tests, completed by March 1969, confirmed Eagle's reliability for lunar vacuum exposure. Modifications to Eagle included the addition of a contingency samples kit in the ascent stage, comprising document bags and tools for rapid collection of up to 15 pounds of lunar material in case of abbreviated surface operations, integrated during final assembly. Propellant loading was adjusted to optimize descent and ascent profiles: the descent stage carried 6,975 pounds of fuel and 11,209 pounds of nitrogen tetroxide oxidizer, while the ascent stage held 2,020 pounds of fuel and 3,218 pounds of oxidizer, fine-tuned based on Apollo 10's orbit insertion data to reduce velocity penalties by targeting a 65.7 by 53.7 lunar . Other updates from Apollo 10 lessons included replacing the Mylar thermal blanket on the descent stage with an ablative paint to prevent flaking and and installing RCS plume deflectors at the launch site. In June 1969, final checkouts at encompassed plugs-out integrated tests, landing gear functionality verification, and solar simulation exposures to assess thermal protection under full-spectrum sunlight, ensuring all systems were launch-ready without anomalies.

Apollo 11 Mission Role

Journey to Lunar Orbit

The Lunar Module Eagle was stacked with the Command Module Columbia on January 29, 1969, at , forming the core of the spacecraft assembly that would later be integrated atop the launch vehicle. On July 16, 1969, at 13:32 UTC, the fully assembled stack lifted off from Launch Complex 39A at aboard SA-506, marking the beginning of Eagle's journey to the Moon. The launch propelled the spacecraft into an initial at an altitude of approximately 190 kilometers, where it completed two orbits to verify systems performance before proceeding. Following the parking orbit phase, the S-IVB third stage of the executed the burn at 2 hours, 44 minutes, and 14 seconds into the mission, accelerating the spacecraft to and placing it on a toward the . This trajectory, designed as a measure to loop and return to without further propulsion if needed, covered the approximately 384,400-kilometer distance to the lunar vicinity in about 76 hours. Throughout the translunar coast, Eagle remained docked to Columbia, with the combined spacecraft traveling along this hybrid free-return path that balanced fuel efficiency and mission flexibility. On July 18, approximately 56 hours into the flight, the crew powered up for the first time by transferring electrical power from through the docking tunnel, initiating systems activation and checkout procedures. Astronauts and , entering the module in their spacesuits, conducted detailed checks of critical subsystems, including communications links with ground control and the descent propulsion system, confirming operational readiness without anomalies. These evaluations ensured 's environmental control, guidance, and propulsion systems were functioning nominally for the upcoming orbital maneuvers. Eagle continued to remain attached to Columbia as the spacecraft approached the , culminating in insertion on July 19 at 17:22 UTC, when the service propulsion system fired for 357.5 seconds to capture the into an initial elliptical of 313 by 113 kilometers around the lunar surface. This insertion marked the end of the translunar phase, positioning Eagle for its subsequent role in the mission while still integrated with the command module.

Descent and Landing

The Lunar Module Eagle undocked from the on July 20, 1969, at approximately 17:44 UTC (100 hours, 12 minutes ground elapsed time), initiating the final preparations for descent to the lunar surface. Following undocking, pilot in Columbia performed a separation maneuver at 18:11 UTC (100:39:50 GET), applying a delta-V of about 0.76 m/s to achieve a safe distance of roughly 335 meters. This maneuver positioned Eagle, crewed by commander and lunar module pilot , for the subsequent Descent Orbit Insertion () burn, which lowered the perilune to 15.7 km while maintaining an apolune of 105 km, setting up a for the powered descent phase approximately six hours later. The powered descent initiation (PDI) began at 19:46 UTC (102:33:07 GET) near perilune at an altitude of approximately 16 km over the lunar nearside, with 's (DPS) engine igniting at 10% throttle for initial braking before ramping up to full power, producing 31 kN of . As the module descended, the landing acquired a signal on the lunar surface at approximately 1,800 meters altitude, providing critical velocity and height data to the guidance computer despite initial discrepancies of up to 900 meters between radar and inertial measurements. However, at around 500 meters altitude (102:44:45 GET), Armstrong detected that the automatic guidance was directing toward a boulder-strewn area near West Crater, prompting a override to take control of the descent. Armstrong's manual piloting extended the descent by about 30 seconds, navigating past the hazardous terrain and selecting a smoother site in the southwestern , while monitored systems and called out descent rates. The engine was throttled down to as low as 10% during the to control velocity, with the touching down at 20:17:40 UTC (102:45:40 GET) at coordinates 0.67408°N, 23.47297°E, approximately 7.6 km downrange from the planned site. Armstrong radioed Mission Control, ", here. The Eagle has landed," confirming success with just 30 seconds of usable fuel remaining—equivalent to about 98 kg—averting an abort that would have been mandatory moments later.

Surface Operations

Following touchdown, astronauts and utilized the Lunar Module Eagle as a base of operations for scientific exploration and sample collection on the lunar surface in the Sea of Tranquility. The crew conducted two extravehicular activities (EVAs) totaling approximately 6 hours, while the Eagle's cabin provided shelter, , and a during the overall surface stay of 21 hours 36 minutes. The , including oxygen, water, and thermal control, sustained the crew effectively throughout this period, enabling them to return 21.5 kilograms of lunar rocks and soil for Earth-based analysis. The first began at 02:56 UTC on July 21, 1969, shortly after a post-landing systems check, and lasted 2 hours 31 minutes. Armstrong descended the ladder first, followed by , marking the initial human exploration of another world. Key tasks included deploying the flag near the to symbolize the achievement, positioning the television camera on the modularized equipment stowage assembly (MESA) to transmit live footage to , and collecting a contingency sample of and rocks. These efforts prioritized immediate documentation and basic geological sampling while the astronauts tested mobility in the 1/6th gravity environment. After re-entering the for a 7-hour rest period, during which the crew slept, ate dehydrated meals, and monitored systems from the cabin, the second commenced at approximately 11:16 UTC on July 21, 1969, and extended for 3 hours 49 minutes. Armstrong and ventured farther from the , up to 60 meters, to deploy the Early Apollo Scientific Experiments Package (EASEP), which included the Passive Seismic Experiment for detecting lunar seismic activity, the (LRRR) for precise Earth-Moon distance measurements, and the composition experiment—a foil sheet to capture solar particles for later analysis. They also gathered additional documented samples, including a core tube extraction, to augment the collection with diverse and fragments, for a total of 21.5 kg from both EVAs. This phase emphasized instrument setup for long-term data return via radio signals to . The Eagle's interior, approximately 4 square meters in volume, functioned as a for the full surface duration, with the crew using it for , suit maintenance, and brief physiological recovery between EVAs. Total rest time inside exceeded 15 hours, including sleep and preparation, underscoring the module's role in supporting human physiology under and extreme conditions ranging from -150°C to 120°C. The operations concluded successfully, yielding foundational insights into lunar and without any major anomalies.

Ascent and Rendezvous

Following approximately 21 hours and 37 minutes on the lunar surface, the ascent stage of Lunar Module Eagle lifted off from on July 21, 1969, at 17:54:00 UTC. The ascent propulsion system engine ignited nominally, providing a of about 16,000 newtons in the low-gravity environment, and burned for 435 seconds until cutoff at 18:01:15 UTC, achieving an initial of approximately 89 by 17 kilometers with a of 1.85 km/s. The trajectory employed a direct ascent profile, reaching a maximum altitude of about 15 km during the initial phase before settling into the low lunar orbit. Rendezvous with the Command and Service Module Columbia required three primary reaction control system burns: the coelliptic sequence initiation at 125:19 GET (approximately 21:51 UTC) to circularize the orbit, the constant differential height maneuver at 126:18 GET (22:50 UTC) to match altitudes, and the terminal phase initiation at 127:04 GET (23:36 UTC) to close the distance, supplemented by two minor midcourse corrections totaling less than 2.5 ft/s. These maneuvers, guided by the rendezvous radar and onboard computer, successfully aligned Eagle with Columbia's 30 by 112 km orbit despite minor deviations in velocity residuals. Docking occurred at 21:35 UTC on July 21, after roughly 3 hours and 41 minutes of operations, with Command Module Pilot manually guiding to contact at a of 0.03 m/s. The probe-and-drogue mechanism latched successfully on the first attempt, and the crews— and from , and from —verified a hard dock before opening the hatches around 21:48 UTC. Crew transfer, including samples and equipment, was completed by approximately 21:55 UTC, allowing and to rejoin in . The ascent stage was jettisoned at 23:41 UTC on July 21, using the to impart a 0.67 m/s change, leaving it in a 101 by 87 km . Its subsequent fate remains unknown, with analyses suggesting it either persists in a long-term or eventually impacted the lunar surface, though no precise has been confirmed.

Post-Mission Fate and Legacy

Component Outcomes

The descent stage of the Lunar Module Eagle remained at after the ascent stage departed with astronauts and on July 21, 1969. This stage, which facilitated the powered descent and landing, now marks the historic site of humanity's first lunar steps and bears the commemorative plaque affixed to one of its landing gear struts. The plaque, measuring 9 by 7.75 inches, reads: "Here men from the planet Earth first set foot upon the July 1969 A.D. We came in peace for all mankind," accompanied by the signatures of Armstrong, Aldrin, , and President . The descent stage's exterior features a multilayer thermal blanket composed of aluminized , Mylar, and other insulating materials to shield against radiant heat from the lunar surface and engine plume pressures during touchdown. This protection ensured the stage's stability in the vacuum and temperature extremes of the , where daytime surface temperatures exceed 250°F (121°C). The site has been imaged multiple times by NASA's (LRO) since 2009, with high-resolution photographs confirming the descent stage's position at coordinates 0.67408° N, 23.47297° E, alongside nearby artifacts like the Lunar Ranging and preserved astronaut footprints. Subsequent missions, including orbital observations during and 16, contributed to early documentation of the area through panoramic and mapping photography. The ascent stage of was jettisoned into following its docking with the Command Module on July 21, 1969, at an initial altitude of approximately 9 nautical miles (17 km). Abandoned without or after separation, its trajectory was influenced by lunar mascons and gravitational perturbations, leading to an unpredictable evolution. As of , the stage's location remains unconfirmed; traditional models predicted an and surface impact within months, but recent analyses indicate it may have entered a , eccentric orbit persisting for decades or potentially escaped into a heliocentric path. A 2021 study, using post-mission tracking data and simulations, determined that the stage's low initial perigee and solar could have preserved it in rather than causing an immediate crash, though no direct observations verify this. No post-mission of the ascent has been achieved, as its orbital path diverged from predictable tracking parameters available at the time, and modern orbiters like LRO have not detected it amid the Moon's debris environment. Efforts to locate it continue through archival data reanalysis and future missions, but its small size—about 12 feet (3.7 m) tall—and reflective surfaces complicate detection from Earth-based telescopes. Beyond the primary stages, the crew discarded numerous minor components on the lunar surface to reduce mass for ascent, including lunar overshoes, portable backpacks, urine and emesis collection bags, tools like and a for sampling, and conveyor bags for equipment transfer. NASA's comprehensive catalogue documents at least 47 such artifacts at , ranging from scientific instruments to personal waste disposal devices, and provide enduring evidence of the mission's operations. These items, scattered within a few hundred meters of the descent stage, have been partially resolved in LRO images, highlighting their role in preserving the site's historical integrity.

Historical and Cultural Impact

The successful landing of the Lunar Module Eagle on July 20, 1969, enabled the first human steps on the , fulfilling a key objective of the and marking a pivotal advancement in space exploration by demonstrating the feasibility of crewed lunar missions. This achievement not only expanded human presence beyond but also catalyzed international collaboration in space science, inspiring a sense of global unity as an estimated 600 million people worldwide watched the event live on television. Among the mission's most enduring iconic elements is Armstrong's declaration upon stepping onto the lunar surface: "That's one small step for man, one giant leap for mankind," a phrase that has become synonymous with human ambition and exploration. The is also prominently featured in the mission patch, depicted as an American eagle carrying an toward the , symbolizing peaceful intent and national pride in the endeavor. Replicas and modified hardware representing Eagle are preserved as legacy artifacts in major institutions, including the National Air and Space Museum's Lunar Module 2, altered to resemble Eagle for public display, and exhibits at the that commemorate the module's role in the landing. In 2019, NASA's announcement of the , named for Apollo's mythological twin sister, explicitly referenced the legacy to underscore continuity in lunar exploration goals. The lunar samples collected near Eagle's landing site, totaling about 21.5 kilograms from Apollo 11, provided foundational evidence for lunar , revealing the Moon's basaltic and supporting theories of its volcanic history and formation from a giant impact with . As of 2025, the Apollo 11 site at is under consideration for heritage protection, with initiatives like the promoting preservation of such locations in line with the to safeguard historical artifacts from future missions. In January 2025, the included the , encompassing , on its biennial Watch list of at-risk sites to highlight threats from unregulated space activities.

References

  1. [1]
    Apollo 11 Mission Overview - NASA
    Apr 17, 2015 · Apollo 11 launched from Cape Kennedy on July 16, 1969, carrying Commander Neil Armstrong, Command Module Pilot Michael Collins and Lunar Module ...
  2. [2]
    50 Years Ago: The Apollo Lunar Module - NASA
    Jan 22, 2018 · Lunar Module (LM), built by the Grumman Corporation in Bethpage, NY, was the vehicle that would take two astronauts down to the lunar surface.
  3. [3]
    [PDF] Apollo Lunar Lander Module Design - NASA
    The Apollo LM had a 4.53 cu.m habitable volume, 100% O2 atmosphere, 2 crew, 16,375 kg mass, and used collection bags for waste. It had 21-33 hours on the moon.
  4. [4]
    [PDF] lunar module | nasa
    The basic structure is primarily aluminum alloy; titanium is used for fittings and fasteners. Aircraft-type construction methods are used. Skin and web panels ...
  5. [5]
    [PDF] Apollo 11 Press Kit - NASA
    use helium-pressurized hypergolic propellants. The oxidizer is nitrogen tetroxide, fuel Is Aerozine 50 (50/50 blend of hydrazine and unsymmetrical dimethyl ...<|control11|><|separator|>
  6. [6]
    Apollo Mission Patches - NASA Science
    Feb 22, 2019 · The American eagle, symbolic of the United States, was about to land on the Moon. In its talons, an olive branch indicated the crew “came in ...Missing: origin | Show results with:origin
  7. [7]
    [PDF] Apollo Lunar Module Propulsion Systems Overview
    • All components located in descent stage of the LM. • Hypergolic propellants ... •All components located in ascent stage of the LM. •Hypergolic ...Missing: design | Show results with:design
  8. [8]
    [PDF] APOLLO EXPERIENCE REPORT - DESCENT PROPULSION ...
    The descent propulsion system provided thrust to transfer the lunar module to the surface, with deep throttling and a cryogenic helium pressurization system.
  9. [9]
    [PDF] Apollo experiance report lunar module landing gear subsystem
    The development of the lunar module landing gear subsystem through the Apollo 11 lunar-landing mission is presented. to satisfy the structural, mechanical ...Missing: reinforced | Show results with:reinforced
  10. [10]
    Apollo Flight Journal - The Apollo On-board Computers - NASA
    Feb 10, 2017 · Data and information on the Apollo on-board computers and especially the Lunar Module programs, routines and descent-type logic.Missing: ROM Eagle<|control11|><|separator|>
  11. [11]
    Apollo's Lunar Module Bridged Technological Leap to the Moon
    Jan 28, 2019 · The contract for designing and building the LM was awarded to Grumman Aerospace in November 1962. A year earlier, North American Aviation ...
  12. [12]
    Lunar Module | Cradle of Aviation Museum
    The Lunar Module (LM), built by the Grumman Corporation in Bethpage, NY, was the vehicle that would take two astronauts down to the lunar surface and return ...Missing: designation | Show results with:designation
  13. [13]
    [PDF] AEROJET LIQUID ROCKET COMPANY
    Feb 2, 1971 · Bell Aerosystems experience with the Lunar Module Ascent. Engine bipropellant valve was reviewed at Niagara Falls, New York, 18 October. 1968.
  14. [14]
    LM Descent Propulsion
    Grumman selected Space Technology Laboratories (STL) to develop and fabricate a mechanically throttled descent engine for the LEM, paralleling Rocketdyne's ...
  15. [15]
    [PDF] Saturn V Step-by-Step | NASA
    Jan 5, 2025 · The Lunar Module was built by Grumman Aircraft in Bethpage, New York. ... The process begins of starting the three fuel cells in the. Service ...
  16. [16]
    http://www.astronautix.com/l/lmdescentpropulsion.html
  17. [17]
    How much did the Apollo program cost? | The Planetary Society
    NASA spent $2.4 billion on the lunar module (LM), or approximately $23 billion in 2020 dollars. Annual costs for the Lunar Module (LM) compared ...
  18. [18]
    50 Years Ago: On The Way to the Moon… - NASA
    Mar 21, 2019 · Grumman completed a series of 16 drop tests at its facility in 1968 using a LM structural test vehicle to prove the structural integrity of the ...Missing: timeline | Show results with:timeline
  19. [19]
    Thermo-Vacuum Testing Certifies Critical Lunar Hardware - NASA
    May 24, 2018 · In the late spring of 1968, NASA conducted two critical tests at the Manned Spacecraft Center (MSC) in Houston to certify components of the Apollo spacecraft ...Missing: Eagle ground White Sands vibration drop 1968-1969
  20. [20]
    50 Years Ago: Apollo 9 Launched to Test the Lunar Module - NASA
    Mar 4, 2019 · The goal of their 10-day Earth orbital mission was to test the Lunar Module (LM), the vehicle designed to land astronauts on the Moon's surface.Missing: Eagle modifications Grumman White
  21. [21]
    [PDF] lunar module flight qualification - NASA Technical Reports Server
    The test operations were conducted in the Manned Spacecraft Center Spacecraft. Acoustic Laboratory which employs a progressive-wave mode of acoustic excitation.Missing: Eagle Grumman Sands vacuum drop 1968-1969<|control11|><|separator|>
  22. [22]
    [PDF] APOLLO 11 MISSION REPORT NOVEMBER 1969
    Changes to the landing gear included removing the lunar surface sen sing probe on the plus Z gear and lengthening the remaining probes and increasing the ...
  23. [23]
    [PDF] APOLLO 11 AS-506 MISSION OP REPORT - NASA
    The Apollo 1 1 Space Vehicle is planned to be launched at 09:32 EDT from Complex. 39A at the Kennedy Space Center, Florida, on a launch : zimuth of 72°. The ...
  24. [24]
    Apollo 11 - Spacecraft Commentary - NASA
    The command module call sign, once the 2 vehicles separate, will be Columbia. Both Columbia and Eagle are GO at this time at 29 minutes 24 seconds and counting.
  25. [25]
    [PDF] Apollo 11 Flight Plan - NASA
    (See Table 1-1 for burn data). 2. Translunar Coast (Duration 73:10) 2:44 - 75:54 GET. After TLI, which places the spacecraft in a free lunar return trajectory,.
  26. [26]
    Apollo 11 Flight Journal - Day 5, part 2: Undocking and the Descent ...
    Feb 10, 2017 · The separation maneuver is scheduled to occur at a Ground Elapsed Time of 100 hours, 39 minutes, 50 seconds; the Descent Orbit Insertion ...Missing: timeline | Show results with:timeline
  27. [27]
    Apollo 11 Flight Journal - Index Page - NASA
    Mar 4, 2020 · Day 4, part 5: Checking Out Eagle · Day 5, part 1: Preparations for Landing · Day 5, part 2: Undocking and the Descent Orbit · Apollo 11 Lunar ...Undocking and the Descent Orbit · Preparations for Landing · Checking Out EagleMissing: timeline | Show results with:timeline
  28. [28]
    The First Lunar Landing - NASA
    May 10, 2018 · In summary, Eagle is about a minute ahead of Columbia, but Columbia has a three minute line-of sight advantage. The net result is that, if all ...
  29. [29]
    Apollo 11 Lunar Surface Journal : Mission Overview - NASA
    Landing site: Sea of Tranquility. Landing Coordinates: 0.67409 degrees North, 23.47298 degrees East (Source: National Space Science Data Center); LROC ...
  30. [30]
    Lunar - Missions - Apollo 11 Samples
    Apollo 11 carried the first geologic samples from the Moon back to Earth. In all, astronauts collected 21.6 kilograms of material, including 50 rocks.
  31. [31]
    [PDF] Apollo 11 Preliminary Science Report NASA SP-214
    the LM systems. The CSM (radio call sign. "Columbia") was maneuvered away from the. LM (radio call sign "Eagle"). At 101:36 g.e.t., the LM descent engine was ...
  32. [32]
    Apollo 11 Flight Journal - Day 6, part 2: Rendezvous and Docking
    Mar 6, 2021 · Eagle goes through various manoeuvres to rendezvous with Columbia. Mike takes over when the two craft are a few yards apart and docks Columbia to Eagle.
  33. [33]
    Apollo 11 Plaque - NASA Science
    Oct 20, 2017 · The plaque was attached to the ladder on the landing gear strut on the descent stage of the Apollo 11 Lunar Module (LM). The plaque was ...
  34. [34]
    Apollo 11 Landing Site - NASA Earth Observatory
    Jul 19, 2009 · Forty years later the Lunar Reconnaissance Orbiter Camera captured this image (top) of the descent stage of the Eagle, Apollo 11's Lunar Module ...
  35. [35]
    [PDF] Catalogue of Manmade Material on the Moon - 2012 - NASA
    Jul 5, 2012 · U.S. Material (Apollo). OBJECT. LOCATION. Apollo 11 - Landing Location: 0.41 ˚ N, 23.26 ˚ E. Passive Seismic Experiment (see below). Gold Olive ...
  36. [36]
    Long-term Orbit Stability of the Apollo 11 Eagle Lunar Module ... - arXiv
    May 21, 2021 · Abstract:The Apollo 11 Eagle Lunar Module ascent stage was abandoned in lunar orbit after the historic landing in 1969. Its fate is unknown.Missing: decay | Show results with:decay
  37. [37]
    Apollo 11 ascent stage may still be orbiting the moon - Phys.org
    Jul 30, 2021 · Meador reports that the ascent stage may not have crashed into the moon after all and might, in fact, still be orbiting the moon. Meador began ...Missing: fate decay
  38. [38]
    Long-term orbit stability of the Apollo 11 “Eagle” Lunar Module ...
    Oct 1, 2021 · The Apollo 11 “Eagle” Lunar Module ascent stage was abandoned in lunar orbit after the historic landing in 1969. Its fate is unknown.
  39. [39]
    Largest TV audience - space event | Guinness World Records
    The largest TV audience for a space event was the first moonwalk by the Apollo 11 astronauts in July 1969 which was watched on TV by an estimated 600 million ...
  40. [40]
    55 Years Ago: Apollo 11's One Small Step, One Giant Leap - NASA
    Jul 16, 2024 · In July 1969, Apollo 11 astronauts Neil A. Armstrong, Michael Collins, and Edwin E. “Buzz” Aldrin completed humanity's first landing on the Moon.Missing: origin | Show results with:origin
  41. [41]
    What's Real, and What's Not? - Smithsonian Magazine
    It was one of 12 lunar modules built for Project Apollo, and was modified to look like the Apollo 11 Eagle for display at the Museum. ... lunar module. There is a ...
  42. [42]
    The Lunar Module Has "Landed" at Kennedy Space Center Visitor ...
    Mar 25, 2019 · Enhancements are underway to celebrate the 50th anniversary of Apollo 11. Lunar Module 9 will be displayed under the Saturn V rocket.Missing: Eagle replica
  43. [43]
    [PDF] lunar samples - NASA
    The 6 Apollo missions that landed on the lunar sur- face returned 2196 samples comprised of 382 kg. The. 58 samples weighing 21.5 kg collected on Apollo 11.
  44. [44]
    Artemis Accords - NASA
    Under the Artemis Accords, signatories intend to preserve outer space heritage, including historically significant sites and artifacts. Space Resources. An ...
  45. [45]
    Moon selected as historical preservation site to protect lunar heritage
    Jan 16, 2025 · The addition of the moon on the 2025 Watch is a step that advocates for international agreements and protections for lunar heritage sites.Missing: Outer | Show results with:Outer