Long Description of Sighting Report

Working on computer noticed from inside the house through an uncovered window a bright light. Thought it was a star until I realized it was moving very very slowly in a very straight line/path. Called my fiance to witness, thought maybe was having a dizzy spell and that the object wasnt moving that I was dizzy. My fiance confirmed the thing was moving. WE watched it until it got to a certain point and it started to fade then it disappeared. It was much lower than the stars.