
The average distance between Earth and the moon is 384,400 km. Adding together the average diameter of Mercury (4,879 km), Venus (12,104 km), Mars (6,771 km), Jupiter (139,822 km), Saturn (116,464 km), Uranus (50,724 km), Neptune (49,244 km), and Pluto (2,300 km) comes to a total of 382,308 km.
Lined up together, this would leave about 2,092 km to spare so things won't get too cramped.
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