Reading the article I didn't see a mention of a previously hypothesised fifth gas giant... so here's a link in case anyone's interested or knows something more.

Reading the article I didn't see a mention of a previously hypothesised fifth gas giant... so here's a link in case anyone's interested or knows something more. https://en.wikipedia.org/wiki/Hypothetical_fifth_giant_planet https://en.wikipedia.org/wiki/Hypothetical_fifth_giant_plane...