1957 triangular UFO near Ill-Wisc border

Summary

In November 1957, a civilian observer near the Illinois-Wisconsin border sighted a large triangular object with red coloring and green and yellow lights. The object emitted a low droning sound and moved slowly back and forth between west and east. The observer's wife also saw it, describing a similar 200-foot object. Although initially considered a balloon or aircraft, the official conclusion pointed to an astronomical aurora. The report includes detailed weather data, precise location, and a thorough description of the event.

The sighting lasted between 5 to 9 minutes, with multiple witnesses confirming the object's presence. Despite no photographs being taken, the detailed testimony and description of a pungent metallic smell suggest it could have been an unusual atmospheric phenomenon. However, the object's strange behavior and appearance remain a mystery to many researchers.