Formation of Lights Passes Over Lubbock — Multiple Nights

I am a professor of geology at Texas Tech University and I wish to provide a precise account of what my colleagues and I observed beginning on the night of August 25, 1951. We were seated in my backyard — myself, Professor W.L. Ducker of petroleum engineering, Professor A.G. Oberg of mechanical engineering, and Professor W.I. Robinson of geophysics — when a semicircular formation of approximately twenty soft blue-green lights passed over us from north to south in complete silence. The passage lasted no more than three to four seconds. We were sufficiently astonished to remain outside, and within an hour a second formation passed. Over the following weeks we made coordinated observations and counted no fewer than twelve separate passes. The objects moved in a precise arc, like points on a curved line, and the speed we calculated — triangulating from two observation points — was approximately 1,800 to 2,000 miles per hour. They made absolutely no sound. The lights were roughly the same brightness as a moderately bright star, slightly bluish. I am a scientist. I record what I observe. We observed these lights on multiple occasions under conditions that precluded any conventional explanation we could identify. Birds do not fly at 2,000 miles per hour in a perfect geometric arc at midnight.