Date: 2008-12-14 21:42:18

Ufologists

Unidentified flying objects

Clyde Tombaugh

Northern Arizona University alumni

Pluto

Lincoln LaPaz

Donald Keyhoe

Green fireballs

Extraterrestrial hypothesis

Pseudoscience

Ufology

Astronomy

Journal of Scienti c Exploration, Vol. 13, No. 4, pp. 685–694, [removed]99

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