Large white ball of light moving silently over Clackamas County, OR.I live in the outskirts of town in the country. Last night, while taking out the garbage at around 9 pm, I was looking at the constellation Triangulum, when I noticed a bright white light right above me (my zenith). It proceeded to move across the sky silently. But was larger than a planet or plane. No blinking lights. I filmed it on my cell phone. As I was filming it a plane comes into view so you can clearly see what a plane looks like and then there is this giant white ball of light just slowly moving across the night sky. It was larger than the plane when the plane finally flew in front of it, blocking out the light for a split second. Before the large object was noticed above me, I saw several little tiny balls of light (think similar to a satellites) moving in different directions, all coming from the constellation of Triangulum. The white ball of light only started moving, once I noticed it above me. This is not the first sighting I have had, but the first! one that I have been able to film. I am unable to upload the video as the file size is too large.