The first humans landed on the surface of the Moon during the Apollo 11 mission. On July 20, 1969, American Astronauts Neil Armstrong and Buzz Aldrin landed on the Moon.
One of the most important missions by NASA lasted 8 days, 3 hours, 18 minutes, 35 seconds.
Based on the interesting transcript of the technical debriefing of the mission, it can be concluded that many things happened during this mission.
Apparently, astronauts bumped into something. They observed one bright object which was passing by. Initially, astronauts believed that it was an S-IVB. After they analyzed this object through the monocular, they concluded that it was L-shaped.
They could not determine its size with accuracy. However, they concluded that it was quite sizeable and in their close vicinity.
They decided to examine the object in the optics. They concluded that it resembled a hollow cylinder.
However, when observed from a different angle, it had an open book shape.
Both astronauts concluded that this discovery was quite unusual and by the end of their mission, they never found out what that object was.