More precisely, the total synodic period of Venus the time from one superior (far side) conjunction of Sun and Venus to the next is 584 days. The Venus Max portion of this period from maximum eastern to maximum western elongation - is some 180 days, which is 30% of the whole synodic ...
675 miles). As the Moon orbits our planet, the illumination of the Sun changes on its surface. The Moon takes about 29.5 days to go from a new moon to a full moon and then back again. This is called a “synodic period” or sometimes, a “synodic month.”...