My fiance was at her mother's house ,she noticed this in the night sky it was not the moon .

Started as a circle bright as day in the night sky to the north east slow moving was not the moon after 10 minutes, it began to flatten out ,at which point another craft or object separated from it and headed towards the ground/horizon the main craft that flattened departed in seconds literally vanishing , no red blue yellow or green light like those on planes drones or helicopters were observed , no reports of local military exercises in the area ,or plane crashes . It was not fire works the main object or craft climbed in altitude faster then any military jet ever observed it covered over 3000ft(rough estimate in seconds before vanishing no sonic boom or sound of after burners like those on military jets which can be heard over a mile away further when going away from point of observation. Animals which are normally heard at night were extremely quiet, horses across the way weren't making a sound also unsual.phone signal also was lost for about 20 to 30 seconds after the high speed climb.