Astronauts, in their own words

"Here men from the planet Earth first set foot upon the Moon, July 1969 A.D. We came in peace for all mankind."

The aluminum plaque left behind on the descent stage of Eagle bears this inscription. It was not spoken by any one astronaut; it was a written commitment on behalf of humanity. The plaque is still on the Sea of Tranquility today — with no atmosphere and no weather, it should remain legible for millions of years.

"I put my thumb up to the window — and I could hide the Earth behind my thumb. Everything I'd ever known, behind my thumb."

Collins was the Command Module Pilot — the one Apollo 11 astronaut who didn't walk on the Moon. In his 1974 memoir *Carrying the Fire*, he returns repeatedly to the image of blocking Earth with his thumb to convey the scale of what you're seeing from deep space. The passage has since become the most-quoted illustration of what philosophers call the "overview effect."

"I think we're going to the Moon because it's in the nature of the human being to face challenges. It's by the nature of his deep inner soul … we're required to do these things just as salmon swim upstream."

At the final pre-flight press conference, Armstrong — usually sparing with words — gave this one long answer about motivation. It casts Apollo not as geopolitical competition but as an expression of a biological pattern: humans, like salmon, are "required" to move against the current. It has become his most cited statement on why humans go to space at all.

"Beautiful, beautiful. Magnificent desolation."

Aldrin spoke these words from the LEM's footpad as he first took in the lunar surface around him. The phrase later became the title of his 2009 memoir, *Magnificent Desolation: The Long Journey Home from the Moon*, where he publicly discussed for the first time the depression and alcoholism that followed his return — a side of the Apollo story the 1969 news cycle never covered.

"Planet Earth — you are a crew."

Koch flew 328 days on ISS in 2019-2020 (the longest single mission for any female astronaut) and in April 2026 became the first woman on a crewed lunar mission. At the Artemis II post-splashdown press conference, she addressed Earth directly with this line. She later described what stayed with her from the Orion window: "Earth's beauty was real, but what made it feel special was how much blackness there was around it."

"I am alone now, truly alone, and absolutely isolated from any known life."

Every time the Command Module passed behind the far side of the Moon, Collins lost radio contact with both Armstrong and Aldrin on the surface and everyone on Earth — for 48 minutes per orbit. He later pushed back on the media label "loneliest human in history": yes, he was out of contact, but he knew exactly where his companions were. On a 50th-anniversary panel he put it: "I have never felt more a part of humanity."