Dr. Josef Allen Hynek was a U.S. astronomer, professor, and ufologist, best remembered for his research into unidentified flying objects. Hynek acted as scientific advisor to the UFO studies done by the United States Air Force under three different names, including Project Sign, Project Grudge, and Project Blue Book. Although he began as a skeptic, his opinions about UFOs changed over time. After his involvement with the Air Force studies, he conducted independent UFO research, developing the Close Encounter classification system, and established the J. Allen Hynek Center for UFO Studies. He died in 1986.
 
 
Recommended Resources
FBI File of Dr. J. Allen Hynek
Obtained through a Freedom of Information Act request, the FBI file of Dr. Hynek, an astronomer and physicist who was a consultant to the U.S. Air Force, is published here.
http://www.cohenufo.org/Hynek/hynk_fbi.htm
A short biography of the astronomer and physicist, who consulted for the United States Air Force in its UFO investigations, and later founded the J. Allen Hynek Center for UFO Studies, is offered, and the Hynek UFO Classification System, which he developed, is outlined.
http://www.mahalo.com/j-allen-hynek/
The Investigations of Dr. J. Allen Hynek
A video about the investigations into the presence and involvement of Unidentified Flying Objects (UFOs), conducted by Dr. Hynek is presented in its entirety here.
http://www.jallenhynek.com/
The J. Allen Hynek Center for UFO Studies
CUFOS was founded by Dr. J. Allen Hynek in 1973, who served as its scientific director until his death in 1986. The center maintains a library and archives of UFO-related materials, publishes information about UFOs, and supports and conducts investigations in areas of interest in the field of ufology.
http://www.cufos.org/
The Secret Life of J. Allen Hynek
Presented by the Committee for Skeptical Inquiry, a Center for Inquiry affiliate, the site offers a critical look at the life and legend of Dr. Hynek, in particular his involvement in UFO research, casting him as a student of the occult from his teen years.
http://www.csicop.org/si/show/the_secret_life_of_j_allen_hynek/