John Glenn did go to space again in 1998 on the STS-95 mission and as a result he became the oldest person to fly in space.
John Glenn was the first American to orbit the Earth, during his historic flight in the Friendship 7 capsule which took place in 1962.
What John Glenn saw in space when he first went into space was a variety of phenomena, which include a strange and glowing phenomenon that he described as fireflies.
Although what John Glenn described as fireflies were later identified as ice particles.
John Glenn also observed Earth features such as a dust storm and fires in Africa, the glow of moonlight on clouds and the ocean and also the brilliant blue band of the atmosphere.
Additionally John Glenn also witnessed in space the wake of a ship and the distinct colors of the Gulf Stream.
John Glenn also saw the sun set and rise 4 times during his 3 orbits in space.
John Glenn saw all this in space during his orbital flight aboard Friendship 7 in 1962.
Friendship 7 was the Mercury spacecraft that was piloted by John Glenn during his historic three-orbit mission on February 20, 1962.
It was the first American to orbit the Earth and marked a significant milestone in the space race.
Glenn's flight aboard Friendship 7 lasted 4 hours, 55 minutes, and 23 seconds.
The Mercury spacecraft that was named Friendship 7 was a small, capsule shaped vehicle that was designed to carry only one astronaut.
And during Glenn's mission, he reported seeing strange particles outside of his capsule and there was also a scare with a potential heat shield malfunction, although it was later determine to be just a faulty sensor.
Friendship 7 was also a crucial step in the American space program and demonstrated that humans could survive and even function in space and paved the way for future space missions.
Friendship 7 is also now part of the Smithsonian National Air and Space Museum's collection.