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(Reuters) — American astronaut Michael Collins, who stayed behind in the command module of Apollo 11 on July 20, 1969, while Neil Armstrong and Buzz Aldrin traveled to the lunar surface to become the first humans to walk on the moon, died on Wednesday at age 90, his family said.

A statement released by his family said Collins died of cancer.

Apollo 11 astronaut Michael Collins
FILE PHOTO: Apollo 11 astronaut Michael Collins’ official portrait is seen in this July 1969 handout photo courtesy of NASA. REUTERS/NASA/Handout/File Photo

Often described as the “forgotten” third astronaut on the historic mission, Collins remained alone for more than 21 hours until his two colleagues returned in the lunar module. He lost contact with mission control in Houston each time the spacecraft circled the dark side of the moon.

“Not since Adam has any human known such solitude as Mike Collins,” the mission log said, referring to the biblical figure.

Collins wrote an account of his experiences in his 1974 autobiography, “Carrying the Fire,” but largely shunned publicity.

“I know that I would be a liar or a fool if I said that I have the best of the three Apollo 11 seats, but I can say with truth and equanimity that I am perfectly satisfied with the one I have,” Collins said in comments released by NASA in 2009.

Collins was born in Rome on Oct. 31, 1930 – the same year as both Armstrong and Aldrin. He was the son of a U.S. Army major general and, like his father, attended the U.S. Military Academy at West Point, New York, graduating in 1952.

Like many of the first generation of American astronauts, Collins started out as an Air Force test pilot.

In 1963, he was chosen by NASA for its astronaut program, still in its early days but ramping up quickly at the height of the Cold War as the United States sought to push ahead of the Soviet Union and fulfill President John F. Kennedy’s pledge of landing a man on the moon by the end of the decade.

Collins’ first voyage into space came in July 1966 as pilot on Gemini X, part of the missions that prepared NASA’s Apollo program. The Gemini X mission carried out a successful docking with a separate target vehicle.

FILE PHOTO: Former astronaut Michael Collins listens at a 40th anniversary celebration of the Apollo 11 mission and the walk on the moon while on Capitol Hill in Washington, July 21, 2009. REUTERS/Larry Downing/File Photo

His second, and final, spaceflight was the historic Apollo 11.

He avoided much of the media fanfare that greeted the astronauts on their return to Earth, and was later often critical of the cult of celebrity.

After a short stint in government, Collins became director of the National Air and Space Museum, stepping down in 1978. He was also the author of a number of space-related books.

His strongest memory from Apollo 11, he said, was looking back at the Earth, which he said seemed “fragile.”

“I really believe that if the political leaders of the world could see their planet from a distance of 100,000 miles, their outlook could be fundamentally changed. That all-important border would be invisible, that noisy argument silenced,” he said.

His family’s statement said they know “how lucky Mike felt to live the life he did.”

“Please join us in fondly and joyfully remembering his sharp wit, his quiet sense of purpose, and his wise perspective, gained both from looking back at Earth from the vantage of space and gazing across calm waters from the deck of his fishing boat.”

© 2021 Thomson Reuters.