On January 4, 2009 at approximately 10:05 p.m. I saw an object in the sky from my window in my home. I live in Tinley Park, Illinois. I was sitting in the living room reading at the time. I saw the object flying in the same location on 2 different times. The first time I saw the object I was by myself in my living room looking out of the window. The second time I saw the object I called a family member and the family member saw the object as well. The first time I saw the object It looked rather odd and thats what made me notice it. When I first saw it-I remember saying to myself,"WOW-This can't be." It went away but came back several min. later and I called my family member in the room. When I saw it the second time it came again from behind a cloud. I noticed the white light first-it was so clear and large. As the object glided more close is when I was able to see the red and green lights on its sides.It appeared to have a white large flashing light in the middle (the light was very large-almost consuming the whole aircraft) with red and green lights on the sides of it. The white light was flashing brightly and the red and green lights were flashing. I originally felt that it was a air plane or helicopter. But I never seen an airplane or helicopter with a rather large white light and 2 red and green lights on the side and it was flying rather low and It wasnt making any noises. It appeared to be gliding. It was flying so low that I was able to see it very clearly. It was rather fascinating to see. The object finally glided over my home and I didnt see it anymore.It was an amazing site to see. Im usually a skeptic but this was rather unusual and something I will never forget.