Did We Really Go?
Moon landing conspiracies vs evidence
Twelve people walked on the Moon between 1969 and 1972. Yet in a 1999 Gallup poll, 6% of Americans said they thought it was staged. Doubts deserve straight answers, so here are the common claims, the physics, and the evidence anyone can check.
NASA, Apollo 16 (AS16-113-18339), Charles Duke, 21 Apr 1972. Public domain.
Asking questions is healthy. The best response to a doubt is evidence, not ridicule. Below, each popular claim gets a fair hearing, followed by the physics. Then comes the proof: rockets you can still see in museums, a computer whose code is public, radio signals tracked worldwide, rocks studied in dozens of countries, mirrors that scientists still bounce lasers off, and photos of the landing sites from orbit.
The claims, one by one
"The flag is waving, so there must be wind"
The claim: In the footage the flag ripples and moves, which should be impossible in a vacuum.
The physics:
The flags had a horizontal rod sewn into the top hem to hold them out, precisely because there is no air. On Apollo 11 the rod did not fully extend, leaving permanent ripples that look like a frozen wave.
The flag only moves when an astronaut twists the pole into the ground. With no air to damp the motion, it actually keeps swinging longer than it would on Earth, and then hangs perfectly still. In the films, it stays motionless once nobody is touching it.
"There are no stars in the sky"
The claim: Photos from the surface show a pitch-black sky with no stars.
The physics:
The astronauts were photographing brightly sunlit grey ground and white spacesuits, so the cameras used fast shutter speeds and small apertures. Faint stars do not register at those settings. Try photographing a floodlit stadium at night: the players show up, the stars do not.
Faking it would actually have been the riskier choice: a studio would have had to put stars in the correct positions for the date, and astronomers would have checked.
"The shadows point in different directions, so there were several studio lights"
The claim: Shadows in some photos are not parallel, and objects in shadow are still visible.
The physics:
Parallel shadows only look parallel on flat ground seen from above. On bumpy, sloping ground and through a wide-angle lens, perspective makes them converge or diverge, exactly as shadows do on Earth at sunset.
Objects in shadow are lit by sunlight bouncing off the bright lunar surface (and off the lander and suits). Several studio spotlights would cast several shadows from every object; the Apollo photos show only one.
"Nobody could survive the Van Allen radiation belts"
The claim: Earth is surrounded by belts of trapped radiation that would have killed the crews.
The physics:
The belts are real, and NASA planned around them. The Apollo trajectories crossed the thinner edges of the belts in a few hours, inside a spacecraft whose hull and equipment gave some shielding. Radiation is dangerous through dose: how much, and for how long.
Each crew wore dosimeters. The doses for whole missions were around 1 rad or less, roughly comparable to a medical CT scan, and far below the level that causes radiation sickness.
"There is no blast crater under the lander"
The claim: A rocket engine should have dug a big crater on landing.
The physics:
The descent engine was throttled down to a fraction of its power for touchdown, enough to hold up a lander that weighed only about 1/6 of its Earth weight. In a vacuum, the exhaust spreads out widely instead of staying a focused jet, so the pressure on the ground was low.
It did blow away the top layer of dust; you can hear Aldrin call out "picking up some dust" and see it streaming away in the landing film. Under the loose dust, the regolith is tightly packed. From orbit, LRO sees bright, scoured "blast zones" around each landing site.
"The film would have melted in the heat"
The claim: The lunar surface reaches over 100 °C, which would have ruined the film.
The physics:
All six landings happened in the lunar morning, with the Sun low in the sky, so the ground was far from its midday maximum. Heat also moves differently in a vacuum: with no air, the film magazines only gained heat by sunlight and direct contact. The Hasselblad cameras had silver finishes to reflect sunlight, and the film was a special thin-base Kodak stock chosen for the conditions.
"If we went then, why haven't we gone back?"
The claim: With today's technology it should be easy, so the silence is suspicious.
The physics:
Going was never the hard part technologically; paying for it was. Apollo was driven by the Cold War race, and at its peak NASA got over 4% of the US federal budget. Once the race was won, funding was cut and the last three planned landings were cancelled.
Robotic missions have returned many times since, from Chang'e to Chandrayaan, and in April 2026 the four Artemis II astronauts flew around the Moon. Landing people again is the goal of the Artemis program.
Watch for yourself
Two short clips that would have been nearly impossible to fake in the 1970s.
More footage: NASA's Apollo Lunar Surface Journal has the full films, audio and transcripts of every moonwalk.
The proof
1. The rocket was real, and enormous
The Saturn V stood 110.6 m tall and weighed about 2,900 tonnes fully fuelled. Its first stage had five F-1 engines, each producing about 6.8 meganewtons (1.5 million pounds) of thrust, about 34 MN in total. In roughly two and a half minutes, that stage burned over 2,000 tonnes of kerosene and liquid oxygen. Thirteen Saturn Vs launched between 1967 and 1973, watched by up to a million people on the beaches near the launch site, and three complete Saturn Vs are on display in the US today.
The lunar module was a two-part spacecraft weighing about 15 to 16 tonnes with fuel. Its descent engine could be throttled, so the crew could hover and choose a landing spot. Its ascent engine was deliberately simple, with no ignition system: its two propellants ignite on contact, so it would start every time. It did, on all six landings.
2. The computer and the 1202 alarm
The Apollo Guidance Computer ran at about 2 MHz, with about 4 KB of working memory (2,048 words) and about 72 KB of read-only memory (36,864 words) made of "core rope": copper wire woven by hand through or around tiny magnetic rings. A modern phone is millions of times more powerful. Its software, written by a team at MIT led by Margaret Hamilton, has been published and runs today in emulators.
During Apollo 11's descent, the computer flashed 1202 and 1201 alarms: it was being flooded with unneeded work from a radar interface. Because the software was designed to restart and keep only its most important jobs, it carried on steering. Then Armstrong saw the automatic landing was heading for a boulder field near a crater, took semi-manual control and flew past it, landing with fuel getting low. A messy, very human story like that is not what a scriptwriter would invent.
A simplified replay inspired by the real display and keyboard (DSKY), not a simulator.
3. The radio signals came from the Moon
Radio takes about 1.3 seconds to travel from the Moon to Earth, so every reply in the recordings arrives about 2.6 seconds after the question, as it must. The TV and voice signals were received by big dishes on three continents: Honeysuckle Creek near Canberra received the first TV pictures of Armstrong's first step, the Parkes radio telescope in Australia supplied the TV for most of the moonwalk, and Goldstone in California received the signals too. The dishes had to point at the Moon to pick them up.
Others were listening who had no reason to play along. The Soviet Union, NASA's rival in the space race, tracked the missions, and it had its own robotic probe, Luna 15, orbiting the Moon at the same time as Apollo 11. The Jodrell Bank Observatory in England followed both spacecraft, and radio amateurs, such as Larry Baysinger in Kentucky, recorded astronaut voice transmissions from the Moon with homemade antennas.
4. 382 kg of rocks no one could have made
Apollo brought back 382 kg of samples, and NASA has lent pieces to scientists in dozens of countries for more than 50 years. The rocks have features that were impossible to make in 1969: tiny "zap pits" from micrometeorites hitting airless rock, gases implanted by the solar wind, a complete lack of water-bearing minerals, and ages of up to about 4.5 billion years. Lunar meteorites later found in Antarctica, and the Soviet Luna and Chinese Chang'e samples, match them.
5. Mirrors still on the Moon
Apollo 11, 14 and 15 left laser retroreflectors on the Moon. Observatories have bounced lasers off them ever since, starting at McDonald Observatory in Texas in 1969. The APOLLO project at Apache Point Observatory in New Mexico measures the distance to millimetres, and observatories in France, Italy and Germany use them too. They are how we know the Moon drifts away 3.8 cm a year. (Two Soviet Lunokhod rovers carry reflectors as well.)
6. Photos of the landing sites from orbit
Since 2009, NASA's Lunar Reconnaissance Orbiter has photographed all six landing sites from as low as about 21 km. You can see the descent stages, the experiment packages, the rovers and their twin tracks, and the trails of footprints where astronauts walked. Japan's Kaguya orbiter detected the disturbed "halo" around the Apollo 15 site, and India's Chandrayaan-2 orbiter photographed the Apollo 11 and 12 sites in 2021.
7. Faking it would have been harder than going
In the low gravity and vacuum, dust kicked up by boots and rover wheels flies in perfect arcs and falls straight down, with no drifting clouds. Recreating that on Earth would have needed a giant vacuum chamber big enough for a rover to drive around in, which did not exist. Aircraft flying arcs to simulate low gravity only manage about 20 to 30 seconds at a time, yet the moonwalks ran for hours on live TV.
Some say the films were simply slowed down. But slowing film changes everything at once: the dust would fall at the wrong rate for the astronauts' movements, and the long, continuous takes would need impossibly long film. The physics in the footage matches 1/6 of Earth's gravity in a vacuum, and thousands of engineers and scientists, including Soviet ones, would all have had to keep the secret for over 50 years.
Quick answers
Did humans really land on the Moon?
Yes. Twelve astronauts walked on the Moon during six Apollo landings between 1969 and 1972. The evidence includes 382 kg of rock samples, laser reflectors still used today, independent radio tracking and orbital photos of all six landing sites.
Why is the flag waving if there is no air?
It is held out by a horizontal rod along the top, and it only moves when the astronauts twist the pole. Without air to damp it, the motion lasts longer, then it hangs still.
Why are there no stars in Moon landing photos?
The cameras were set for the bright sunlit surface, so faint stars were far too dim to show up, just as in photos of a floodlit stadium at night.
How did the astronauts survive the Van Allen belts?
The trajectories crossed the thinner parts of the belts in a few hours, inside the spacecraft. Measured doses for whole missions were around 1 rad or less, far below dangerous levels.
Can telescopes see the Apollo landing sites?
No telescope on Earth can: the lunar modules are far too small at that distance. But spacecraft orbiting the Moon, such as NASA's LRO and India's Chandrayaan-2, have photographed them.
What was the 1202 alarm on Apollo 11?
A warning that the guidance computer was overloaded. It restarted and kept running its most important tasks, so Mission Control called "go" and the landing continued.
Why haven't people been back to the Moon since 1972?
Mainly cost and politics. After the Cold War race ended, funding was cut. Robots have visited many times since, Artemis II flew astronauts around the Moon in 2026, and NASA's Artemis program aims to land people again.
Sources and credits
- Gallup (1999), poll on belief that the Moon landing was staged.
- NASA, Apollo Lunar Surface Journal (transcripts, films and photos for every landing).
- NASA Marshall Space Flight Center, Saturn V news reference and F-1 engine fact sheets; NASA, Apollo program summary report (JSC-09423, 1975).
- NASA, Apollo Flight Journal; Eyles, D. (2004), Tales from the lunar module guidance computer (1201/1202 alarms).
- Virtual AGC project, Apollo Guidance Computer source code and emulator.
- NASA, Biomedical Results of Apollo (SP-368, 1975), radiation dosimetry chapter.
- CSIRO, Parkes and Apollo 11; Honeysuckle Creek Tracking Station history.
- NASA Astromaterials (JSC), Lunar sample collection.
- Murphy, T. W. (2013), Lunar laser ranging: the millimeter challenge, Reports on Progress in Physics 76; McDonald Observatory laser ranging history.
- NASA/GSFC/Arizona State University, LROC images of the Apollo landing sites; ISRO, Chandrayaan-2 OHRC images of Apollo 11 and 12 sites (2021); JAXA, Kaguya Apollo 15 halo (2008).
- NASA, NASA History Office on Apollo budget and staffing; Launius, R. D., Apollo: A retrospective analysis (NASA, 2004).
Photos credited to NASA, NOAA and other public-domain sources are used with thanks; BotBuhdy adds a small botbuhdy.com mark. Pictures labelled AI-generated illustration are artist-style illustrations made for this page, not photographs.