A while back, I mentioned the make up of the solar system, specifically the outer planets. Now, I don’t want to confuse you, but it turns out I may have been wrong about Pluto.

The debate over what Pluto actually is has been re-ignited recently by the discovery of a fifth moon.  It has more moons than all of the inner planets combined.

Mind you, having a moon is not the definition of a planet, so all it’s done is make people start talking about it.  In case you were wondering, to be a planet an object needs to be spherical, orbit the sun, and have a gravity strong enough to clear its orbit of smaller objects.  It’s on that last point that Pluto fails.

Some people think that Pluto and its largest moon, Charon, should be classified as a binary planet system (the IAU doesn’t agree).  I wonder, what would it be like to live on a binary planet?  Would it even be possible or would there be gravitational problems and such like that prevented an atmosphere forming?

Is there anyone out there with a better grasp of astrophysics than I who could comment on the possibility?

And has this been done already?  I could definitely be interested in reading a novel featuring this idea.

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