The Apollo landings (1969–1972) are among the best-verified events of the 20th century. They were verified by evidence that does not depend on NASA's word alone. The popular hoax claims are listed below with the documented response to each. Separately, the Cold War space race did involve real secrecy — that is covered at the bottom, and it is a different story.
Bottom line: the Apollo landings happened. The hoax claims below are tagged by what the evidence says, not by how popular they are.
1 · The documented record
VERIFIED
Orbital imagery of the landing sites
NASA's Lunar Reconnaissance Orbiter Camera imaged all six Apollo landing sites, showing the descent stages left behind and the astronaut tracks between equipment. LROC images also show that the flags are still standing and casting shadows at every site except Apollo 11, where Buzz Aldrin reported during the mission that the flag was blown over by the ascent-engine exhaust. Chinese, Indian and Japanese spacecraft have also been reported to have spotted the sites.
Apollo 11, 14 and 15 left laser retroreflector arrays (Soviet Luna 17 and 21 carried others). Observatories worldwide, including the Observatoire de la Côte d'Azur in France, have fired lasers at them and recorded the returns for more than 57 years, measuring the Earth–Moon distance to millimetre level.
The Jodrell Bank radio telescope in England tracked Apollo 11 and, at the same time, the Soviet probe Luna 15, which crashed while Apollo 11 was on the Moon. Jodrell Bank says it heard both sides of the astronaut–ground conversation. The UK observatory was not under NASA control.
The Apollo missions returned about 382 kg of lunar rock and soil, which laboratories worldwide have independently verified as lunar, and around 8,400 photographs.
The Soviet Union had its own rival Moon programme and a large scientific community. A widely cited Wikipedia summary notes that the Great Soviet Encyclopedia (1970–1979) reports the Apollo 11 landing as fact. Treat this item as secondary: it relies on a Wikipedia article, and Soviet tracking of Apollo itself is not documented here.
DEBUNKED Claim contradicted by documented evidence. ALLEGED Reported or claimed; not established in the public record.
DEBUNKED
“The flag 'waves' in the wind, but there is no wind on the Moon.”
Documented response: The flag hangs from a horizontal rod along its top edge, and the creases come from being folded for the journey. It moved only while astronauts handled it. LROC later showed the flags still standing at the sites, which an image taken in a studio could not do.
Documented response: It is daytime on the lunar surface, and the astronauts and ground are brightly lit. Cameras set for that brightness need a fast shutter speed and small aperture, so faint stars do not register.
“The shadows are not parallel, so there must be studio lights.”
Documented response: Perspective makes parallel shadows appear to converge or diverge in a photo, and uneven ground changes their direction. The same effect appears on Earth under a single low Sun.
BBC Sky at Night Magazine ↗ https://www.skyatnightmagazine.com/space-missions/how-we-know-apollo-moonlandings-werent-hoax
DEBUNKED
“The Van Allen radiation belts would have killed the astronauts.”
Documented response: The spacecraft crossed the belts quickly on a trajectory chosen to minimise time in them, inside an aluminium shell. The Institute of Physics reports an average dose of about 0.46 rad across the nine missions that reached the Moon.
Institute of Physics ↗ https://www.iop.org/explore-physics/moon/how-do-we-know-we-went-to-the-moon
DEBUNKED
“If we went in 1969, why has no one been back since 1972?”
Documented response: Attention and budgets shifted (the Vietnam War, a sense the race was won, then the Space Shuttle and the space station). The question is about priorities, not about whether the landings happened.
Documented response: No evidence has been offered for it. The film 2001: A Space Odyssey came out before the first landing, and its depiction of the Moon differs from the Apollo footage. This claim is tagged Alleged because it is an assertion with no supporting evidence, not because any record contradicts a specific detail. The source is Wikipedia (weak); a stronger primary source was not found.
Secrecy during the Cold War was real. None of these items suggests the landings were faked.
VERIFIEDDocuments released and published by the National Security Archive on 20 July 2014
Military lunar base and related studies, 1959–1961
Declassified documents show that in 1959–61 the US Army and Air Force studied military uses of the Moon, including a lunar outpost proposal (Project Horizon) and a 'Lunar Based Earth Bombardment System' study. These were studies and proposals, not executed plans.
VERIFIEDDocuments in the same National Security Archive collection
Moon-related signals intelligence and Soviet collection
The same collection includes documents on Moon-bounce collection of Soviet radar signals, a study of detonating a nuclear device near the Moon, a 1965 estimate of Soviet moon-landing intentions, and an episode in which a Soviet space capsule on an exhibition tour was taken and returned. See the collection index for what each document does and does not say.
VERIFIEDCORONA imagery declassified by Executive Order 12951 (Feb 1995)
Satellite reconnaissance kept secret, then declassified
The US reconnaissance satellite programme ran in secret during the space race. President Clinton's 1995 order declassified imagery from the CORONA satellites. This shows space-race secrecy was real, and that it concerned intelligence, not the Apollo landings.