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I have a new paper out! Over the weekend I'll do a thread on what the Solar System can tell us about rocky exoplanets— but for now, enjoy this to-scale set of cross sections I made of the rocky worlds in *this* system! (They're all different, but still all variations on a theme...)

Also, note that we have the least information about Venus' interior of any of these bodies, even Io. So that's why it isn't shown with a solid inner core. Maybe it has one! But we can't yet tell.

Wait, Mercury's inner core is of similar size to that of the Earth's? Does that mean Mercury was roughly Earth-sized in the distant past?