On October 15th 2011, just past 11pm Mountain time in Thornton, Colorado, I was letting my two dogs out in the back yard. I looked up in the sky to the North direction and saw what may have been a UFO or at least some type of unknown aircraft. It was flying quite low and must have been less than a mile or at max two miles away. It was flying in an easterly direction. It was a very dull gray and almost transparent craft. It was in the shape of a large V, with what seemed to look like 5 very dull gray rather large lights on it. I witnessed it flying and called out to my husband and he didn’t take me seriously until he came over and saw it flying soundlessly, rather cruising along slowly before it disappeared, our view now being blocked by my house. After he acknowledged seeing it he thought that maybe it was some kind of new stealth fighter being tested. But we found it weird that they would fly so low in a well populated area and not make a sound as well. We looked all over the internet and could not find any pictures, UFO or man crafted of this V shaped ship. Then we found a report describing the exact ship yesterday in Illinois. Reading that someone else had seen the ship kind of freaked us out. This compelled us to write a report as well. NOTE: The above image is a rendering.