A Gibbous Moon
NASA Image of the Day Download time: Apr 28 2011 8:16 AM ET
This waxing gibbous moon with 83 percent of the disk illuminated was photographed by retired AT&T engineer and amateur photographer Ralph H. Bernstein on April 14, 2011, in Monmouth County, New Jersey. A gibbous moon is but one of the moon's phases and occurs when the size of the illuminated portion is greater than half, but not yet a full moon. A waxing gibbous moon is the period between a first quarter moon and a full moon, when the illuminated region of the moon is increasing each day.
Image Credit: Ralph H. Bernstein (Used by Permission)