Myself and my girlfriend were laying in bed between 11-12pm when an extremely loud vibration noise startled us. we instinctively jumped up and opened the window to look outside, when suddenly a huge black triangle moved directly over the top of the house and out heads at an extremely low altitude. the lights observed, along with the black underneath of the craft, made a perfect triangle shape. the craft also appeared solid due to it blotting out the stars as it was observed. the lights themselves were completely static and did not blink or pulsate, with a larger dim white light positioned at the centre of the craft. we both observed the object a it slowly drifted off into the distance until it was out of sight. upon seeing the craft i knew it was not a conventional aircraft due to the extremely slow but steady rate at which it moved, long with the steady unblinking lights - and needless to say we was both left shaken and concerned as to what we had just witnessed. a craft of that size flying at such a low altitude over a populated area seemed completely out of the question to myself as i tried to reason that what we witnessed could have been a secret military aircraft such as the tr-3b - but again what would such a secretive project be doing flying so low over populated areas? i simply submitted this in hopes for some closure on what we witnessed that night.