The question of how many flights there were to the Moon remains one of the most debated in the history of astronautics. Despite the fact that more than half a century has passed since the last human visit to our satellite, interest in the lunar program NASA does not fade away. Numerous documentaries, declassified archives and modern research allow us to recreate an accurate picture of the events that took place in the late 1960s and early 1970s.
Official statistics say that in total there were six successful landings of astronauts on the surface of the Moon. These missions became part of a large-scale program "Apollo", the goal of which was not just to reach the satellite, but also to conduct large-scale scientific research. Each flight is unique in its technical complexity and set of tasks to be solved, from the first careful landing to long-term expeditions using the lunar rover.
It is important to understand that the path to the surface was long and included several testing stages. Not all launches resulted in landings, but they were critical for testing life support and navigation systems. In this article we will examine in detail the chronology of all missions, the names of the heroes who were there, and the technical features of the ships that allowed humanity to make this giant leap.
⚠️ Attention: There is often confusion between the number of Apollo spacecraft launches and the number of landings. In total, the program included 17 launches, but only the crews of missions 11 to 17 visited the Moon.
Apollo program: the path to the first step
The history of the lunar race began long before the first astronaut set foot on the regolith. Program Project Apollo was launched NASA in response to a challenge from the Soviet Union. Engineers had to solve the most difficult problems: create a launch vehicle of sufficient power, develop docking systems in outer space and ensure the safety of the crew in radiation conditions.
First missions such as Apollo 7 and Apollo 8, were purely testing. They did not involve landing, but made it possible to test the operation of the ship in orbit of the Earth and the Moon, respectively. Apollo 9 worked out the docking of the lunar module in near-Earth space, and Apollo 10 conducted a dress rehearsal for all stages of the flight, descending to an altitude of 15 kilometers above the surface of the satellite.
The technical basis for success was the launch vehicle Saturn-5. This colossal piece of engineering remains the most powerful rocket ever successfully launched into space. Its thrust made it possible to deliver a payload weighing more than 45 tons to the Moon, which was an absolute record for that time.
Did you know that the computers on board the Apollo missions had less processing power than a modern musical greeting card, but they handled navigation with incredible accuracy.
Apollo 11: the historic mission of 1969
On July 20, 1969, humanity reached the surface of another celestial body for the first time. Mission Apollo 11 became the culmination of many years of effort by thousands of engineers. The crew of Neil Armstrong, Buzz Aldrin and Michael Collins accomplished what was previously considered science fiction.
While Collins was operating the command module "Columbia" in orbit, Armstrong and Aldrin descended on the lunar module "Eagle". The landing process went abnormally: the on-board computer showed overload errors, and the fuel was running low. Armstrong was forced to manually fly around the crater field to find a flat landing area.
The astronauts spent just over two hours on the surface. They planted the US flag, placed scientific instruments and collected soil samples. Armstrong's phrase "One small step for a man..." became a symbol of the era. This mission proved that manned flights long distances are possible and safe with proper preparation.
- 🚀 Launch date: July 16, 1969.
- 🌑 Surface time: 2 hours 31 minutes.
- 👨🚀 Crew: Neil Armstrong, Buzz Aldrin, Michael Collins.
- 📍 Landing location: Sea of Tranquility.
Subsequent landings: Apollo 12 to Apollo 17
After the triumph of the eleventh mission, the program did not stop. Apollo 12 demonstrated high navigation accuracy, landing in close proximity to the automatic station Surveyor 3. Astronauts Charles Conrad and Alan Bean conducted two spacewalks, which allowed them to collect more samples and install more sophisticated equipment.
Mission Apollo 13, although it did not reach the surface, became an example of heroism and engineering skill. The explosion of the oxygen tank brought the crew to the brink of death, but thanks to the actions of the control center and the astronauts themselves, they returned safely to Earth. This flight is often referred to as a "lucky failure".
Subsequent expeditions (14, 15, 16, 17) became increasingly longer and more scientifically intensive. Starting from Apollo 15, used on the Moon LRV (Lunar Roving Vehicle) is an electric lunar rover that has significantly expanded the radius of exploration. Astronauts could travel several kilometers from the landing site, exploring geological formations that were previously inaccessible.
Technical characteristics of lunar modules
A key element to the program's success was the two-stage lunar module. It consisted of a landing stage, which remained on the Moon, and an ascent stage, which carried the astronauts back into orbit to the command module. The design was as lightweight as possible, since every extra gram required huge amounts of fuel.
The module engines ran on heptane and nitrogen tetroxide. These components self-ignited on contact, providing reliable starting in a vacuum without the need for a complex ignition system. The life support system regenerated the air by removing carbon dioxide using lithium hydroxide.
The appearance of the modules, sheathed in gold and silver foil, has become iconic. The foil acted as a thermostat, protecting the crew from extreme temperature changes, which on the Moon range from -173°C at night to +127°C during the day.
Why did the lunar module look so angular?
The aerodynamic shape was not needed in a vacuum. Engineers designed the module purely for functionality and minimizing weight, so it resembled a giant insect rather than a sleek rocket.
List of all astronauts who have walked on the Moon
In the entire history of mankind, only 12 people have visited the surface of the Moon. They were all American men participating in the program NASA. Their names are forever inscribed in the history of science and space exploration.
The first was Neil Armstrong, and the last was Eugene Cernan, who left the satellite on December 14, 1972 as part of the mission Apollo 17. It is noteworthy that Harrison Schmitt, a participant in the last expedition, was the only professional geologist among all those who landed, which emphasizes the scientific focus of the final stages of the program.
Many of these people, after returning, devoted themselves to social activities, science or business. Their experiences in low gravity and isolation are still being studied by psychologists and doctors in preparation for future missions to Mars.
| Mission | Astronaut (LM Pilot) | Year | Duration EVA |
|---|---|---|---|
| Apollo 11 | Neil Armstrong, Buzz Aldrin | 1969 | 2h 31m |
| Apollo 12 | Charles Conrad, Alan Bean | 1969 | 7h 45m |
| Apollo 14 | Alan Shepard, Edgar Mitchell | 1971 | 9h 22m |
| Apollo 15 | David Scott, James Irwin | 1971 | 18h 35m |
| Apollo 17 | Eugene Cernan, Harrison Schmitt | 1972 | 22h 04m |
⚠️ Warning: Do not confuse the command module pilots who remained in orbit with those who descended to the surface. In total, 24 people were in orbit of the Moon at different periods of time, but only 12 of them went down.
Scientific results and soil samples
The main goal of the expeditions was not just the flag, but science. The astronauts collected 382 kilograms of lunar soil and rocks. These samples were delivered to Earth in special sealed containers. Their study made it possible to determine the age of the Moon (about 4.5 billion years) and confirm the theory that the satellite was formed as a result of a collision of the Earth with another planet.
Laser reflectors were installed on the surface, which are still used today to accurately measure the distance to the Moon. Seismometers were also deployed to record “moonquakes” and instruments to study the solar wind. These data laid the foundation for modern planetary science.
The results of the missions showed that the Moon is a dead world without an atmosphere and a magnetic field, but its geological history is complex and interesting. The discovery of water ice reserves in the polar regions, which were later discovered thanks to probes, was a direct consequence of the interest generated by the program Apollo.
☑️ What did the astronauts take with them to the Moon?
Why flights stopped and plans for the future
After 1972, manned flights to the Moon ceased. The main reason was the high cost of the program and shifting US political priorities. Attention turned to the creation of orbital stations Skylab and programs Space Shuttle. In addition, the public began to lose interest after the landing ceased to be a sensation.
However, in the 21st century, interest in the satellite has revived. New technologies make it possible to plan the creation of permanent bases. Program Artemis from NASA aims to return people to the moon in the coming years, including the first woman and the first non-white person.
Modern plans involve not just short-term visits, but the creation of infrastructure for long-term stays. This includes the construction of a lunar orbital station Gateway and the development of new landing modules that will be much more spacious and technologically advanced than their predecessors from the 60s.
Humanity has not gone to the Moon since 1972, not because of the loss of technology, but because of a lack of political will and funding. Now these barriers are being overcome again.
Is it true that a flag flies on the moon?
No, the flag is not flying. It had a horizontal bar at the top to prevent the fabric from hanging down in a vacuum. The fluttering effect in the photographs was due to the inertia of the fabric when planting the flag and the lack of air resistance that would normally straighten out the folds.
How much did the Apollo program cost?
According to 2020 estimates, adjusted for inflation, the program cost the United States approximately $280 billion. This makes it one of the most expensive projects in the history of mankind, but the technological response from it will pay back the costs many times over.
Can ordinary people fly to the moon?
Currently, such flights are not available to tourists. However, private companies such as SpaceX have already announced plans to send civilians on voyages. The cost of such travel is expected to decrease in the future.
What happened to the lunar modules after takeoff?
The take-off stages were reset after docking with the command module. Most of them fell on the Moon and crashed (seismographs recorded these impacts), and some, as in the case of Apollo 10 and Apollo 13, were sent into heliocentric orbit around the Sun.