Bright green spherical object seen from Loma Rica Road, Loma Rica, CA.On Friday May 15, 2009 at approximately 8:40pm, I was driving approximately 45 mph northbound on Loma Rica Road, just south of Hill Road, Loma Rica, California. Through my windshield I observed a single spherical bright green glowing object traveling roughly south and descending at about a 20-degree angle. The object appeared to be about 500 to 550 yards from my position, was traveling at an even pace, at a speed I would guess to be about 80 to 90 mph. From my perspective, I would guess the size of the object to be slightly larger than a basketball. It did not leave a debris or vapor trail. I lost sight of the object as it passed my windshield to my right due to the tree line on the property adjacent to the roadway. It was my impression the object should have come into contact with the ground two to three miles from the road if it continued on the trajectory that I observed. I did not hear or see an impact.