Four silent, orange lights moving from SW to NE from horizon to horizon in about a minute.I was walking the dog last night on the golf course and around 8:40pm noticed an orange light in the sky moving SW to NE. Because I was on the golf course, I had a good unobstructed view from horizon to horizon. I tried, but couldn't hear any sound from it. It had no green and red aircraft lights and no flashing lights, only an orange slightly pulsating light. It seemed very high in the sky and seemed to vanish into the horizon. It took about a minute for it to travel from one horizon to the other. I saw three other such lights, ending at about 9:10pm, about equally spaced in time. My best guess is that they were some sort of rocket (?), but it seemed to move too slowly. And it seemed too fast to be an air-breather. Someone suggested it might be a high altitude weather balloon.