A noiseless cluster of bright lights packed in a tight line formation passed overhead and disappeared suddenly.

A tight line formation of lights which all emitted unchanging white lights with various degrees of brightness slowly flew overhead, making no noise as they did so. They flew in from the southwest, heading eastward. I grabbed two others shortly after noticing this phenomenon, and showed them what I was seeing. All of us saw the same thing and had no clear explanation. At around 10:25pm MST, not long after it passed overhead, the lights started to fade and quickly disappeared without a trace. All observers were between the ages of 19-26, and the sighting was pure chance as the original sighter noticed it after getting back from a nightly walk. 2/3 observers were under no influence of any substance within 24hrs of the sighting.