At approximately 20:00 hours (8 PM) my granddaughters and I were in the backyard star gazing with binoculars. We were setting up to get a look at the Andromeda Galaxy but clouds were blocking that portion of the sky. We therefore occupied ourselves with identifying individual stars and constellations. Suddenly I noticed a light moving across the sky from high above, proceeding north to the horizon. It appeared to be very high in altitude and moving too rapidly for a conventional aircraft. The speed, however, was far too slow to be a meteor. We are familiar with aircraft as they are constantly descending into Newark and other New York airports. The luminosity was that of an average to slightly below average star. I observed it with the binoculars and there were no lights.just the "star" appearance. As I watched it, it suddenly stopped! Among the stars this was easy to see. It then proceeded forward... zigged and zagged. Excited, I yelled to my granddaughters, "We've got our first UFO!" We watched it move toward the northern horizon as it stopped - proceeded - suddenly changed directions and then disappeared over the horizon to the north. Nothing man made could have made these sudden and erratic moves.