If Earth were the size of a grain of salt …

If Earth were the size of a grain of salt, our solar system (only out to Neptune!) would be 352 meters wide — that’s a grain of salt sitting inside about three and a half football fields of space. If you include the whole solar system (out to the Oort cloud), it’s more than 2,000 times more space: a grain of salt in a region about 450 miles wide. (That’s like flying from San Francisco to Seattle — a two-hour flight—and encountering virtually nothing but a few specks along the way.)

David Blatner, Spectrums: Our Mind-Boggling Universe From Infinitesimal to Infinity, as quoted by Glenn Fleishman in “Where in the Solar System Has Voyager 1 Wound Up?

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