The July full "Buck Moon" rises tonight to lead Saturn, Mars and Mercury in a spectacular mini planetary parade through the summer sky. It's often called the Buck Moon, to reflect the time when young male deer grow out their antlers. Look to the southeastern horizon at sunset to catch the full Buck Moon as it creeps slowly into the summer sky. Mercury, Mars and Saturn follow the full moon through the summer sky in the early hours of July 30. Correction 7/29: Look to the southeastern horizon at sunset to catch the full Buck Moon, not the southwestern horizon.