Astronomy Picture of the Day . ... Perigee Moon, Apogee Moon . ... Tonight, those blessed with clear skies can enjoy a glorious full moon, the last full moon of the "Y1.9K"s. In fact, tonight's moon will be a full-perigee-solstice moon, reaching its full phase and perigee (the closest point in its orbit) on the solstice, the first day of northern hemisphere winter. ... Our Sun is unusual in that it is alone - most stars occur in multiple or binary systems. ... Irregular Galaxy Sextans A . ...