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Quick quiz: How many planets are there in our solar system?

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Quick quiz: How many planets are there in our solar system?
Paul F. Offline
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#3
01-17-2015, 10:18 PM
At 200 AU, the question is if they are gravitationally bound to the sun at all, or if they're "just passing through" fairly slowly...
And out of respect for Clyde Tombaugh, I still consider Pluto to be grandfathered in... Even if Dr Tyson and the IAU don't....
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Re: Quick quiz: How many planets are there in our solar system? - by Paul F. - 01-17-2015, 10:18 PM

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