Orange fly object over Wheaton,ILFlying orange round object flying from north to south. Had no blinking lights.Not sure the distance away but was due west of our location. It flew slowly across the sky then eventually up and disappeared abruptly.Saw 9 of these same objects closer in the sky in September and the were orange but appeared to be more square in shape. In September they were flying northwest to south east. 7 of them flew individually in the same direction approximately 5 minutes apart. 2 flew in a side by side formation.The last 9th object gave the same appearance as this evening and abruptly went black.Objects made no sound.We live approximately 25 miles from O'hare airport Chicago and there were many other airplanes visibly identifiable in the sky at the time. Tonight's orange object passed line of sight with an airplane.