An extremely large black/dark triangle object with a light at each corner moved slowly over Surprise, AZ in a SW direction disapearing over the white tank mountains over a period of about 10 minutes. was driving home from the grocery store at the time. even pulled over trying to get a good picture but it just wouldn't show up on the phone camera. Stars were blocked and not visable whithin the triange area but could be seen everywhere else in the sky. the thing was massive. followed it until i got home (it was right at the white tank mountains at that time) & ran to get a good camera. by the time i got back outside it was gone. the entire time that i did see it, it was moving in a straight path slowly in a SW direction.