30339 Zip Code (Vinings, GA) Detailed Profile. Cities: Vinings, GA (36.92%), Sandy Springs, GA (13.02%), Smyrna, GA (0.52%), Marietta, GA (0.23%) Counties: Cobb County, GA (86.98%), Fulton County, GA (13.02%)
  The moon measures about 2160 miles (3476 km) across. The distance is about one fourth the diameter of the Earth, and 400 times smaller than that of the sun.
The Earth is 12,740 km (7900 miles) across, and the Moon 3474 km (2150 miles) in diameter, for a ratio of 3.7. A standard NBA basketball is 24 cm (9.4 inches) in diameter, and a tennis ball 6.7 cm (2.6 inches), for a ratio of 3.6. Pretty good! Iâll have to remember that; itâs pretty useful.