8-12 purely white chevron shapes flying in a perfect "V" formation then gone in an instant.Approximately 23:30 on the night of April 14th, 2015, my husband, mother-in-law, father-in-law and I were outside having a fire. I noticed movement in the sky coming from the north/northeast and heading south.For a split second, I thought I was seeing a flock of pure white birds moving in a flying "V" formation. Upon further glance, I noticed there was no movement of wings and the formation stayed in a perfect "V" shape. This night the moon was covered by clouds, and there was no source of illumination nearby to explain the pure white color. There were approximately 8-12 objects that were pure bright white in color, which were in the shape of a boomerang or chevron. The entire formation seemed to be moving very fast, and within a minute of spotting it, it just completely vanished out of sight. Ten seconds later, my in-laws who were standing 20 feet behind us, noticed it completely vanish out of sight. This all happened within 30-40 seconds.