NASA Astronaut Scott Carpenter:
"At no time, when the astronauts were in space were they alone: there was a constant surveillance by UFOs."
Astronaut James Irwin:
"Look, I have a pension to worry about. I have a family to take care of, and they told me to just back away from this entirely or else."
Cosmonaut Victor Afanasyev:
"It followed us during half of our orbit. We observed it on the light side, and when we entered the shadow side, it disappeared completely. It was an engineered structure, made from some type of metal, approximately 40 meters long with inner hulls. The object was narrow here and wider here, and inside there were openings. Some places had projections like small wings. The object stayed very close to us. We photographed it, and our photos showed it to be 23 to 28 meters away."
Astronaut Eugene Cernan:
"I've been asked about UFOs and I've said publicly I thought they were somebody else, some other civilization."
Astronaut James McDivitt:
"At one stage we even thought it might be necessary to take evasive action to avoid a collision.; Astronaut James McDivitt commenting on an orbital encounter he and Ed White had with a ;weird object with arm-like extensions which approached their capsule. Later in the flight they saw two similar objects over the Caribbean."
Astronaut Donald Slayton:
"I was testing a P-51 fighter in Minneapolis when I spotted this object. I was at about 10,000 feet on a nice, bright, sunny afternoon. I thought the object was a kite, then I realized that no kite is gonna fly that high. As I got closer it looked like a weather balloon, gray and about three feet in diameter. But as soon as I got behind the darn thing it didn't look like a balloon anymore. It looked like a saucer, a disk. About the same time, I realized that it was suddenly going way from me-and there I was, running at about 300 miles per hour. I tracked it for a little way, and then all of a sudden the xxxx thing just took off. It pulled about a 45 degree climbing turn and accelerated and just flat disappeared." Donald Slayton, Mercury astronaut, in a 1951 interview."
Astronaut Brian O'Leary:
"We have contact with alien cultures."
Former Chief of NASA Communications Systems, had the following to say:
"All Apollo and Gemini flights were followed, both at a distance and sometimes also quite closely, by space vehicles of extraterrestrial origin - flying saucers, or UFOs, if you want to call them by that name.
Every time it occurred, the astronauts informed Mission Control, who then ordered absolute silence."