Tap any card to reveal its definition. One card opens at a time, for 8 seconds. You can re-open cards as many times as you need.
Click a term on the left, then click its definition on the right. Each correct match is worth 1 point.
On July 20, 1969, two American astronauts β Neil Armstrong and Buzz Aldrin β became the first humans to walk on another world. Their spacecraft, Apollo 11, was the result of nearly a decade of work by more than 400,000 scientists, engineers, and technicians at NASA. Between 1969 and 1972, six Apollo missions successfully landed twelve astronauts on the Moon. They returned with 382 kilograms (842 pounds) of lunar rock, deployed scientific instruments, and left behind reflective devices that researchers still bounce lasers off today.
In 1976, a former Navy technician named Bill Kaysing self-published a pamphlet titled We Never Went to the Moon. He argued that NASA lacked the technology to actually reach the Moon and instead filmed the landings on a movie set, possibly in the Nevada desert or at Area 51. His claims gained traction in the early 2000s when a Fox television documentary aired similar ideas. Surveys today show roughly 6 to 7 percent of Americans, and higher percentages in some other countries, doubt the landings actually happened.
Common hoax claims include: (1) the American flag appears to wave even though there is no air on the Moon; (2) no stars are visible in the photographs; (3) shadows in some photos point in different directions, suggesting multiple studio lights; (4) the deadly radiation of the Van Allen belts would have killed any astronauts; and (5) there is no blast crater under the lunar lander. Each claim sounds reasonable at first β but each has a clear scientific explanation rooted in vacuum physics, optics, and the specific properties of the lunar environment.
Learning to evaluate evidence is one of the most important skills in science. A good scientist does not believe a claim because it sounds convincing; a good scientist asks what would have to be true for the claim to be correct, and then tests it. In the next sections, you will examine each major hoax claim, compare it to the evidence, and run small experiments to see whether the physics actually supports the conspiracy or the official record.
One challenge for any hoax theory is independent verification. The Soviet Union β the United States primary rival in the Space Race β tracked all Apollo missions with their own radio telescopes. They never disputed the landings. In 2009 and again in 2011, NASA Lunar Reconnaissance Orbiter photographed all six Apollo landing sites from orbit, showing the abandoned descent stages, scientific instruments, and even the astronaut tracks in the lunar regolith. Japan, India, and China have also independently photographed Apollo landing sites. For the hoax to be real, every one of these nations would need to be in on the deception.
Show what you understood from the reading. Each response is worth 1 point. Word banks and prompts are provided to help you write strong, complete sentences.
Drag (or click) the words into the correct order. Words turn green when placed in the right spot.
Take the bare-bones sentence and expand it using the prompts. Add details to make a complete, scientific sentence.
"In Apollo footage, the American flag appears to wave and ripple. Since there is no air on the Moon, this is impossible β the flag must have been filmed on Earth in a studio."
The flag had a horizontal rod sewn into the top to hold it open. When astronauts twisted the pole into the lunar regolith, the flag rotated with the pole. In a vacuum, with no air to dampen motion, the flag continued moving for longer than it would on Earth.
Run the experiment in BOTH environments. Complete this table β 4 points.
| Environment | Time Flag Kept Moving (sec) | Was There Sound? | Did Air Resistance Slow It? |
|---|---|---|---|
| Earth (atmosphere) | |||
| Moon (vacuum) |
"In every Apollo photograph, the sky is completely black with no stars. If the astronauts were really on the Moon, the sky should be filled with stars. NASA forgot to add them to the studio backdrop."
Camera exposure was set for the bright sunlit lunar surface. Stars are far too dim to register at fast shutter speeds. Try this on Earth: photograph a brightly lit street at night with normal camera settings β the stars will not appear in the photo even though you can see them with your eyes.
Adjust the shutter speed. Watch what happens to the lunar surface and the stars at each setting.
Move the slider to each setting and record what you observe β 4 points.
| Shutter Setting | Lunar Surface (correct/dark/blown out) | Stars Visible? (yes/no) |
|---|---|---|
| Fast (1/1000) | ||
| Medium (1/250) | ||
| Slow (1 sec) | ||
| Very Slow (10 sec) |
"Some Apollo photos show shadows pointing in different directions. The Sun is the only light source on the Moon, so all shadows should be parallel. Different angles mean multiple studio lights were used."
Shadows on uneven terrain only appear to point different directions when projected onto slopes, hills, and craters. Photograph parallel shadows on Earth across a hilly field and they will appear non-parallel too. Shadows are also affected by perspective from the camera angle.
Compare the SAME scene from two angles. Top panel: what a satellite would see β proves the sun direction. Bottom panel: what the astronaut's camera captures β what the conspiracy theorist sees. Move the slider to add terrain.
Set the terrain to each level. Record what BOTH panels show β 4 points. Notice that the top-down answer should always be the same, while the camera answer changes.
| Terrain Bumpiness | π‘ Top-Down: Shadows Parallel? | π· Camera View: Shadows Parallel? | Camera Shadow Spread (Β°βα΅’β β Β°βββ) |
|---|---|---|---|
| Flat | |||
| Slight bumps | |||
| Hilly | |||
| Very rugged |
"The Van Allen radiation belts surround Earth and contain enough charged particles to kill any astronaut. Astronauts couldn't have survived flying through them β therefore Apollo never went to the Moon."
Apollo trajectories were specifically designed to pass through the thinnest, lowest-radiation portions of the belts at high speed. Total transit time was only about 1 hour. The aluminum hull of the spacecraft blocked most particles. Each astronaut received a measured dose smaller than that of a single chest CT scan.
Examine the chart below comparing total radiation doses for various activities. Apollo astronaut doses are listed in millisieverts (mSv).
Record the actual measured doses from real Apollo dosimeter data β 4 points.
| Mission | Total Dose (mSv) | Fatal? (yes/no) | Compared to: 1 chest CT (~7 mSv) |
|---|---|---|---|
| Apollo 11 | |||
| Apollo 12 | |||
| Apollo 14 | |||
| Apollo 17 |
Reference data: Apollo 11 = 1.8 mSv, Apollo 12 = 5.8 mSv, Apollo 14 = 11.4 mSv, Apollo 17 = 5.5 mSv. (5,000 mSv is the lethal dose.)
"Even if some claims have explanations, there is no real proof astronauts were ever on the Moon."
Apollo 11, 14, and 15 placed retroreflectors on the lunar surface β special mirrors that bounce light directly back to its source. Today, observatories in Texas, France, and Italy regularly fire laser pulses at these reflectors and detect the returning light. This proves equipment is physically present at exact locations the astronauts reported. Robotic missions did NOT carry these reflectors there.
Fire a laser pulse at one of the Apollo retroreflector locations. Time how long the light takes to return, then calculate the Earth-Moon distance.
Speed of light = 3.0 Γ 10βΈ m/s. Distance = (Speed Γ Round-trip time) Γ· 2. Complete this table β 4 points.
| Apollo Site | Round-trip Time (sec) | Calculated Distance (km) | Reflector Found? |
|---|---|---|---|
| Apollo 11 | |||
| Apollo 14 | |||
| Apollo 15 |
Use everything you have learned. Match each conspiracy claim to the scientific evidence that debunks it. Each row is worth 1 point.
| Conspiracy Claim | Scientific Evidence That Debunks It (Your Words) |
|---|---|
| 1. The flag waves on the Moon | |
| 2. There are no stars in the photos | |
| 3. Shadows go different directions | |
| 4. Van Allen belts would kill astronauts | |
| 5. There is no real proof of a landing |
Pick a tile to answer. Each correct answer is worth its point value. You can only answer each tile once.
5 questions drawn from a 20-question bank. Mastery = 60% (3 / 5 correct). Each question is worth 1 point. If you score below mastery, you can retry with a new set of questions. Earn the 5 points only on a passing attempt.
Your final grade for the Moon Landing Hoax Investigation Lab.
All your answers, data tables, and quiz results β printed for your records and grading.