Step by Step
1
The crew and their roles
Neil Armstrong became the first human on the Moon. Buzz Aldrin became the second. Michael Collins served as Command Module Pilot, remaining in lunar orbit the entire time and never actually setting foot on the Moon himself.
2
The date and landing site
Apollo 11 landed on July 20, 1969, at the Sea of Tranquility — a landmark moment often remembered by Armstrong's "one small step" phrase.
3
The complete list of successful landings
Six Apollo missions successfully landed on the Moon: Apollo 11, 12, 14, 15, 16, and 17. Apollo 13 was aborted after an oxygen tank explosion, and never actually landed. Apollo 17 (December 1972) remains the last crewed Moon landing to date.
4
Program totals and context
In total, 12 humans walked on the Moon across these six successful landings, and 842 pounds (about 382 kg) of lunar samples were returned to Earth. The entire program was driven by Cold War competition, following the Soviet Union's earlier successes with Sputnik (1957) and Gagarin (1961).
Applied Walkthrough
1
On July 20, 1969, Apollo 11 landed at the Sea of Tranquility, with Neil Armstrong becoming the first human to set foot on the Moon, followed shortly by Buzz Aldrin as the second.
2
Meanwhile, Michael Collins remained in lunar orbit the entire time as Command Module Pilot — playing an essential role in the mission's success, even though he never actually walked on the lunar surface himself.
3
This single mission was just the first of six total successful landings (Apollo 11, 12, 14, 15, 16, and 17) — notably excluding Apollo 13, which was aborted after an oxygen tank explosion and never actually landed.
4
Across all six successful landings, a total of 12 humans walked on the Moon, bringing back 842 pounds (roughly 382 kg) of lunar samples — the culmination of a program driven fundamentally by Cold War competition, following the earlier shock of Sputnik in 1957 and Gagarin's historic 1961 spaceflight.
Exam Application
Exams test whether you know exactly which crew members walked on the Moon during Apollo 11 versus who remained in orbit, and whether you can correctly list all six successful Apollo landing missions (specifically knowing Apollo 13 is excluded from this list).
⚠ Common Trap
The most common trap is forgetting that Michael Collins never actually walked on the Moon — he served as Command Module Pilot, remaining in lunar orbit throughout the mission while Armstrong and Aldrin descended to the surface, a role that's easy to overlook given how much attention the two moonwalkers receive.
✓ Quick Self-Check
1. Who were the three crew members of Apollo 11, and what was each one's role?
Neil Armstrong (first human on the Moon), Buzz Aldrin (second), and Michael Collins (Command Module Pilot, remained in lunar orbit).
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2. When and where did Apollo 11 land?
July 20, 1969, at the Sea of Tranquility.
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3. Which six Apollo missions successfully landed on the Moon?
Apollo 11, 12, 14, 15, 16, and 17.
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4. Why is Apollo 13 excluded from the list of successful landings?
It was aborted after an oxygen tank explosion and never actually landed on the Moon.
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5. How many total humans walked on the Moon, and how much lunar sample material was returned?
12 humans; 842 pounds (about 382 kg) of samples.
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