Three days into the Apollo 11 flight, the astronauts on board sent a strange message to the mission control asking, " Do you have any idea where the S-4B is with respect to us ? ", the astronauts were asking where the final stage of the rocket was, which had been detached two days prior. The reason for this inquiry was because something was riding along side of the rocket and it wasn't part of the rocket, Apollo 11 had a visitor.
The crew on board did not wanted to make a big deal out of the object for fear that it would cause a panic and mission control would order astronauts to abandon the mission. "The three of us were not going to blurt out, hey Houston we got something moving along side of us and we don't know what it is we weren't about to do that..... some one might of demanded we turn back because of aliens or whatever it is", said the astronaut, Buzz Aldrin when discussing the situation at a later date.
Mission control did not answer the astronaut's cryptic question about the location of the S-4B unit. The unit was approximately 6,000 miles from their location. What Aldrin and the other three astronauts were looking at, was an Unidentified Flying Object exhibiting an intelligent flight path. But this incident is still a mystery as there is no concrete evidence about what the thing was.
