In this interview that took place in 1977 Dr. J. Allen Hynek admits that astronomers have sighted UFOs. Hynek says that sixty-four U.S. astronomers who responded to a UFO survey said that they had sighted UFOs:
http://www.youtube.com/watch?v=3h7KD_Fdn88
Astronomer Dr. J. Allen Hynek was the U.S. Air Force’s scientific consultant on UFOs.
Dr. J. Allen Hynek