approach from east sky, several lights in symetrical boomerang shape, orbited earth in about 10 min. saw again same flight path much higher, saw third time even higher took about 10 min. again to circle earth as it was apparently leaving earths gavitational domain.I was standing up in with my sleeping bag up around my body as I was facing east looking for falling stars. I thought I saw one but was surprised to see it coming towards me. It gradually got larger until it streaked passed me directly above me what seemed to be about 2 to 3 thousand feet high, it was hard to tell, but the wing span was visually about 200 feet. It could have been a formation of several crafts, all I saw was a number of lights in a symetrical boomerang shape. No noise was made. The wing shape continued into the western skyline and disappeared. I was very excited and tried to wake my friend. He didn't see it. I stood there looking into the east hoping to see it again. I figured it might be coming around again. It did. This time it was much higher in the sky. It streaked past again. My friend missed it again. Then to my surprise I saw it again even higher. This time my friend saw it. It flew away into the western sky and that was it.