A brilliant, white,silent circular light moving above us from southwest to the northeast.

My wife an I were at the door of our house in a suburb an all of a sudden we did see a very bright, intense,white light flying above us toward the northeast at about 800 feet or so. My brother in law saw it as well from another location in the vicinity.  We are sure was not an airplane nor an elicopter. We really never knew what it was. What it call our attention is that it was cpmpletely silent.