I was outside at a party, laying on the lawn looking at the sky. I was just looking at the blue sky when I saw a silver round object. I thought it was a jet, but it had no contrail and was not moving. I looked at it some more and it started moving away and it disappeared and appeared several times. I went in to tell some of my friends but I couldn't locate it again. I have never seen a UFO before and I was kind of frightened because it was so out of the norm of what I experience everyday. I also felt that it had known that I was watching it somehow but I don't know how, I just felt it. I would say it was 5,000 feet above me due to that it was level to the tip of the Ruby Mtn range.