More on “The Grand Tack”
http://www.armaghplanet.com/blog/the-grand-tack.html
I don’t even know what’s inside my golf balls anymore and you expect me to care about the insides of a gas giant?
Mars has a tasty nougat core.
I remember back in my college days, there was a theory floating around that Mercury might actually be the core of a Neptune size gas giant that got too close to the sun and had all it’s gas stripped away, the theory came from the fact the Mercury is much denser than any of the other terrestrial planets which could only be explained if it was formed under much greater pressure.
No.
It has a nuclear power plant there.
Not everyday you see an article with the word "perijove" in it. Of course the word is a monstrosity--"peri" is Greek for "around" and "Jove" is from the Latin genitive of the name Jupiter. But the genitive of "Zeus" is "Dios" so coining a word for an orbit of the planet Jupiter from that root wouldn't convey the meaning clearly like "perijove" does, by Jove.