Tonight: Biggest Full Moon of 2009
According to NASA, tonight will be a perigee Moon. A perigee Moon looks 14% wider and 30% brighter than the Moon typically appears. This happens because the Moon's orbit around the Earth is not circular, it is elliptical. Because of this elliptical orbit, its distance from the Earth varies. Tonight, the Moon will be at its closest point to the Earth, the perigee, and it will look huge.