I went outside around 0015 hours to the front porch to smoke. I sat on the glider looking down the street. I live on a cul-de-sac and had an unobstructed view down the middle of the street and into the west sky. Within a couple minutes while looking at the stars to the west (it was a very cold clear night), I witnessed a bright green orb materialize at approximately a forty-five degree angle approximately 700 - 1000 feet from my position. The orb grew from a golf ball size to a basketball size while hovering for approximately 10 to 15 seconds. The object suddenly darted to the south on the same plane (approximately 500 feet in two seconds) and disintegrated leaving an orange trail of fire as if it exploded, but I heard no noise. There was no trail of fire or smoke as it traveled south and it kept the same perfectly round shape until it exploded. I have no idea what it could have been. It was definitely not fireworks or a power surge as there are no power lines that far off the ground or in that direction.