Regarding no gassy planets near our sun: The rocky ones, including earth, [are supposedly the cores of old gassy ones](http://www.astrobio.net/exclusive/4220/ro

Regarding no gassy planets near our sun: The rocky ones, including earth, [are supposedly the cores of old gassy ones](http://www.astrobio.net/exclusive/4220/rocky-planets-could-have-been-born-as-gas-giants http://www.astrobio.net/exclusive/4220/rocky-planets-could-h...).