How Many Moons Does Earth Have?

How Many Moons Does Earth Have? : Discovery News: "It turns out Earth's single giant moon might not be the only one floating around out there. In fact, at any given time, there may be at least one other "minimoon" orbiting our planet as well. A moon doesn't have to be gigantic -- our minimoons can be as small as one meter across. But they are definitely orbiting us, sometimes for a year or more."