Was watching sky out in front yard and saw a faint light traveling at steady speed no noise gliding through air effortlessly

Went into my front yard to look at the stars and again observed a faint circular object in the night sky. I have seen many of these in our 9 years living here and this is the 2nd one of the night. These type of sightings I almost have to concentrate and look a bit differently into the night to focus my attention to the fainter objects which travel this area quite frequently in my experience. At other times these objects start of quite bright but then their light dims and disappears. After some disappear their light comes back but not as visible almost as if they know you are watching them.