John Glenn, a man who followed adventure into both the heavens and politics, passed away Dec. 8 in an Ohio State University medical center. He was 95.

A hero of the 1960s space program, Glenn made history on Feb. 20, 1962 when he became the first American to orbit the Earth.

"I don't know what you can say about a day when you see four beautiful sunsets," he told Mission Control during his historic flight. "This is a little unusual, I think."

After serving for 24 years in the U.S. Senate, Glenn made history again in 1998 by becoming the oldest man to fly in space. At the age of 77, he spent nine days aboard the shuttle Discovery in orbit, with NASA closely studying his vitals.

"For four days, I had 21 different leads — brainwaves and respiration and EKG — 21 different body parameters being recorded and sent down to the ground," Glenn noted in 2011.

John Glenn Glenn couldn't stop inspiring the rest of us — or slow down. He's shown here arriving at Kennedy Space Center in October 1998, part of the final preparations for the Discovery flight. ‘To look out at this kind of creation out here and not believe in God is to me impossible,’ he said about that famous trip. (Photo: NASA)

In remembering his former colleague and friend, astronaut Buzz Aldrin described him as a space pioneer and world icon.

"With the news today I’m saddened again to hear that we have lost the pioneer of space flight for the United States, second only to Yuri Gagarin, and he will always go down in history as certainly one of the most influential officers in the Marine Corps and of course as one of the original Mercury 7 astronauts," wrote Aldrin. "I am very sorry that he has departed us with his wisdom."

In addition to tributes from all around the world, including one from President Obama who credited Glenn with "lifting the hopes of a nation," social media has also remembering the late hero with thousands of quotes and photos.

Below are just a few more of our favorites honoring an American legend:

https://twitter.com/michikokakutani/status/807115484571336708

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.