Constructing a model of the solar system

Here is a rough approximation of the size of the objects that the groups should wind up with: Object Diameter Approximate Size of Model Possible Object of Approximate Size Sun 1,390,000 km 69.5 cm 70 cm exercise ball Mercury 4,880 km 2.5 mm Small pebble or BB shot Venus 12,104 km 6 mm Bead or large ball bearing Earth 12,756 km ................
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