((NUFORC Note: Missile launch out of Vandenberg AFB. PD))We spotted a beam of light coming from a bright circle, that left a green residue in the sky.My friends and I spotted a light that kind of looked like a spotlighting helicopter. There was a huge flat light coming out of a little circle in the sky. It looked as if it was spotlighting houses. It was moving around. At first we thought it was a helicopter, but when we got out of the car, you couln't hear anything. The circle turned into an oval, and then into a little slit where the light was coming from. Then, it looked like it turned around, and the source dissapeared. The light was still shining down, but it began to fade, and seemed to dissapate into the air. The light turned into what looked like a greenish teal residue, and then slowly faded. The source was really far away, but the light was very big, so it's hard to believe it was a helicopter.