Neil Armstrong, the first human being ever to set foot on the moon, died Saturday following complications from heart surgery. He was 82. The legendary astronaut, who captivated the world on July 20, 1969, when he stepped off the Eagle lunar module as some half a billion earthbound people watched the grainy image on TV, is perhaps best remembered for uttering one of the twentieth century's most enduring phrases: "That's one small step for [a] man, one giant leap for mankind." Received as a hero on his return to Earth, Armstrong preferred life away from the spotlight, leaving NASA shortly after the iconic Apollo 11 mission to become a professor of engineering at the University of Cincinnati. He represented the rarest kind of creature, says Ed Yong at Discover Magazine: "The humble hero." Here, writers and stargazers honor his memory:

Armstrong was brave and unflappable
"Astronauts do not like to be called heroes," says The Economist. "Their riposte to such accusations is to point out it requires the efforts of hundreds of thousands of backroom engineers, mathematicians, and technicians who make space flight possible." But such demurring never works, especially in the steely and unflappable Armstrong's case. Once, Armstrong ejected from a lunar training vessel just seconds before it smashed into the ground and exploded. According to witnesses, "Armstrong dusted himself off and coolly went back to his office for the rest of the day, presumably to finish up some paperwork." 

He epitomized the best of his generation 
Armstrong's was a "quiet bravery," says Adam Frank at NPR. He had a "calm just-get-it-done skill," and in many ways, he epitomized the optimism that many latched onto during the raucous, divisive '60s. In spite of the turmoil and dissent stemming from the Vietnam War, the Cold War, and the assassinations of Robert F. Kennedy and Martin Luther King Jr., an important idea simmered in America's collective consciousness: "Technology combined with our own audacity would allow us to do great things." And that's exactly what Armstrong captured: The idea that anything was possible. 

Armstrong was humble to a fault
The legendary astronaut avoided the spotlight, says James M. Clash, author of The Right Stuff, at Bloomberg Businessweek. For years, Armstrong denied my requests for interviews, and it wasn't until years after I'd gained his trust and friendship that he finally agreed to be interviewed for my book — a gesture he knew would mean the world to me. "That's the kind of man Armstrong was. In a world where everything is about 'me, me, and me,' he was a rare throwback to a time when humility and character counted, when people routinely risked their lives not to get rich, bloviate, or self-aggrandize, but for their country, science, and exploration." 

And his death may have been under-covered
For one magical week in 1969, Armstrong was the most visible man on television, says the Associated Press. But strangely, "television news didn't seem to fully recognize the importance of the first human to walk on the moon on the weekend he died." The relative lack of coverage is understandable in some ways: Late on an August Saturday, most networks have half their staffs at the beach. And because Armstrong was relatively shy, he didn't leave much of a video record. There were no "reunions with old astronauts or public appearances. No Armstrong chats with David Letterman." There was the moon walk, and that's it. "His death was like his life: Strangely muted given the magnitude of his achievements."