Driving north of highway 1a on range road 53 at approx. 9am i noticed three white orbs moving slowly across the sky. the orbs were white and had the texture of a pure white cloud. the orbs were perfectly spaced apart and moving from west to east. they were approx. 500ft above the ground and as they passed in front of the hills in the distance they became more clear due to the contrast to the hills. they seemed to be approx. basketball sized from my perspective but could have been up to 10ft in diameter if they were closer or further away from the hills in the backdrop. i witnessed them for about a minute as i drove up the road and when i parked and got out to get another look, they were not were i estimated them to be, rather they had disappeared.