We were outside giving my child a ride on my dads tractor. Afterwards, we stood and were talking, when i became fixed on a ball of light moving in the sky behind him. At first i thought it was a helicopter's headlights, but it was silent. We all were observing it as it followed a straight path, and then moved swiftly (not speeding, but moving faster than a hellicopter) in the opposite direction from us. I expected My dad to explain what we saw, but he couldn't. There was no sound, and it was flying low. As i observed it moving, I almost glimpsed a dark orb like object.