How do scientists know how planets there are, it is not like they have been to them or gone by them and how do they know that Pluto is the smallest planet? They can’t be sure, for the further away you are from the sun, the colder you get.
How do scientists know how planets there are, it is not like they have been to them or gone by them and how do they
Posted on June 18, 2013 by in Question. Comments Off on How do scientists know how planets there are, it is not like they have been to them or gone by them and how do they
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