While sitting outside first noticed what I thought was a floating spider web or pollen moving slowly upward and to my right (I was facing SE) Object was,elongated, thin, white in color. Object estimated at less then 1/2 inch (at longest) and less then 1.8 inch in width at arms length.As object moved to my right it "dipped", then suddenly pointed up, and increased speed, then disappeared.The weather was clear, sunny (sun higher and to left of object) and ground wind of less then 1 mile per hour (per weather instrument).The "sighting" lasted less then three seconds.With a minute after object dissapeared a military aircraft was seen flying SE and another aircraft about a minute later in same direction.The contrails of both craft disappeared within less then tow minutes.I continued viewing area for the next hour with no activity seen.