The Center for UFO Studies was a group founded by an American astronomer who acted as scientific advisor to UFO studies undertaken by who?
Center for UFO Studies:  The group was founded in 1973 by J. Allen Hynek, who at the time was the Chair of the Department of Astronomy at Northwestern University in Illinois. J. Allen Hynek:  Hynek acted as scientific advisor to UFO studies undertaken by the U.S. Air Force under three consecutive projects: Project Sign (1947–1949), Project Grudge (1949–1952), and Project Blue Book (1952–1969).
i don't know