I am a roofer, I was leaving a job site and was going up a hill and came to a stop sign.
At this angle my vision was directed towards the top of a bluff and the stars on a cloudless sky.
I then noticed that the stars were being blocked out by a large t-shaped object moving slowly to the north. I knew this because it would block out the stars as it moved. It made no sound, and had no lights.
It moved very slowly. Too slow to be a plane,or anything else I can think of. I know what I saw.