How long is the solar system?


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Solar system How many miles long is the solar system from end to end? Well, it depends a bit on how you define the "end." If you choose Pluto, the outermost planet, as the end, then the diameter of the solar system is 80 A.U. A.U. means "astronomical unit"; then the distance between Earth and the sun equals 93,000,000 miles. So that would be 7,440,000,000 (over seven billion) miles.

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