from Earth Mars 23 cm (9 in) dodgeball 7.2 km (4.5 mi) Rock Creek Park Golf Course King's College London Bondi Beach, New South Wales Ceres 3 cm (1 in) golf ball 13.3 km (8.3 mi) Jupiter 4.55 m (15 ft) sphere as wide as 5 minivans 24.9 km (15.5 mi)