At or about 2005 hrs. on friday the 21st of october 2016 i observed a white ball of unknown size at an unknown altitude moving west to east with out a sound at a very rapid speed. i first observed the object at approximately the 12 o’clock position, i observed it for approximately 15 seconds when it disappeared over the horizon. i appeared to be on a straight flight path and might have been decending in altitude. the object flew along a line between needles, ca. and page, az.