Yellow slightly orange 7 ft round silent luminescent object somewhat slowly glided low to ground 15 ft. In front of me.

I have 5 photos of three unexplained single separate small lights in my yard that faces woods.   There was alot of unexplained, and never seen before, light, and an unusually long sunset.   
I walked my dog an hour later after sundown and saw a round silent yellow orb about 7 feet wide glide gracefully and somewhat slowly across the distance near the woods where the small lights were earlier.   
I have never in my long life seen anything like it.