Summing up the diameters of all planets (except earth) is 380018 km, which is between the range for the lunar distance. The average lunar distance is 384399 km.

Summing up the diameters of all planets (except earth) is 380018 km, which is between the range for the lunar distance. The average lunar distance is 384399 km. https://science.nasa.gov/resource/solar-system-sizes/ https://science.nasa.gov/resource/solar-system-sizes/ The lunar distance from the Wikipedia entry is from center of earth to center of moon, so if we want to be more precise we would need to subtract the radius of both earth (6371 km) and moon (1737 km), in order to find the distance between their surfaces. So on average we have: distance from surface of earth to the moon = average lunar distance earth radius - lunar radius = 384399 - 6371 - 1737 = 376291 km Which means that putting all the planets side by side, starting from the surface of the earth, we could fit them but not on an average day, we’d need the moon to be a bit above the average distance :-)