All the planets would fit between the earth and the moon


And what a view that would be.  At low tide.
I pulled my numbers from NASA’s Solar System Fact Sheets, and they’re a little different from the original infographic, but close enough that the comparison is still valid.

PlanetAverage Diameter (km)
Mercury4,879
Venus12,104
Mars6,771
Jupiter139,822
Saturn116,464
Uranus50,724
Neptune49,244
Total380,008

The average distance from the Earth to the Moon is 384,400 km.
Image and text from Universe Today, via reader Adrian Morgan's The Outer Hoard.

The question I have (for any budding planetary scientists out there) is how is it possible to measure the diameter of a gas giant planet like Jupiter?  I understand all the data in the table are expressed as "average diameter" because even the Earth is not round, but the Earth's diameter is measured on a solid.  How can data be obtained on a gas giant, where the gases would (presumably) gradually thin out as one gets further from the center.  It seems ridiculously presumptuous to express such data to a precision of 1 km.

That aside, the concept of all the planets fitting between us and our moon is still mind-boggling.

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