Clyde Tombaugh was the American astronomer who discovered the planet Pluto. On August 20, 1949, he observed a UFO that appeared as a geometrically arranged group of six-to-eight rectangles of light, window-like in appearance and yellowish-green in color, which moved from northwest to southeast over Las Cruces, New Mexico.
Tombaugh was probably the preeminent astronomer to have reported seeing Unidentified Flying Objects. On August 20, 1949, Tombaugh saw several UFOs near Las Cruces, New Mexico. He described them as six to eight rectangular lights, stating “I doubt that the phenomenon was any terrestrial reflection, because… nothing of the kind has ever appeared before or since… I was so unprepared for such a strange sight that I was really petrified with astonishment.” A similar shocked response has been reported by many other who claim to have seen mysterious aerial objects.
Tombaugh was also later to report having seen three of the mysterious Green Fireballs, which suddenly appeared over New Mexico in late 1948 and continued at least through the early 1950s. In 956 Tombaugh had the following to say about his various sightings: