Almost 5:30 am . . . southern DFW metroplex, used to large planes flying into DFW airport, but heard a loud roaring sound which got louder and louder, sounded very low to ground . . . ran out back and saw the most amazing unidentified aircraft flying northeast over the metro! Wingspan unbelievable!!!!! Covered in lights - not any kind of military aircraft I know of - have never seen anything like this!!