I was standing in my backward watering plants and admiring the moon lit summer nights sky. i noticed what appeared to be a star, however the star was not twinkling. the object was moving north east slowly and suddenly darted south west very fast and it's light dimmed until i was unable to see it or track it further. the object appeared to only move in the two directions mentioned, first north east and then south west very quickly. as soon as i witnessed the object, i notified my girlfriend and quickly performed a google search as to how i could report the event. i suspect it may have been military, considering edwards air force base is about 70 miles to the east of my location. my reaction was fear. fear only because i've gazed at the stars my whole life and have never seen anything move that fast in the sky. i have not been drinking nor am i on any medications or drugs. additionally, i have never witnessed what others have described as a ufo. this is the first time i've ever seen anything concerning in the sky.